The comments were made in Comey's first interview since writing his book, "A Higher Loyalty: Truth, Lies and Leadership", which is scheduled for release Tuesday.
In the interview, which was Comey's first since the fallout between him and Trump that led to the firing of the former as FBI Director on May 9, 2017, Comey called the President a serial liar, who treated women like "meat" and called him a "stain" on everyone who worked for him.
Comey said he had noticed Trump's face "looked slightly orange up close with small white half-moons under his eyes, which I assume are from tanning goggles".
Asked if the president wanted the Justice Department to investigate Comey, White House spokeswoman Sarah Huckabee Sanders said Sunday on ABC's "This Week" that she was not aware of a specific request. Trump spoke in monologues, he said, but did not listen.
ABC published the full transcript of the interview on its website.
Comey said in the exclusive interview with ABC News' George Stephanopoulos, which aired at 10 p.m. on Sunday (0200 GMT on Monday), that it is "possible, but I don't know" whether Russian Federation has evidence to back up the allegations about Trump's Moscow trip. "I don't remember consciously thinking about that, but it must have been".
Comey says he was just as surprised as everyone else that he was sacked in the middle of an important ongoing investigation: "I thought it's insane to fire me".
'I hardly even knew this guy. His "memos" are self serving and FAKE!'
In an interview with ABC's "20/20" that aired on Sunday evening, Comey explained how he didn't want to attend and actively tried to avoid Trump during a reception for law-enforcement leaders the day after the president's inauguration. "Just another of his many lies", Trump tweeted.
Trump fired Comey last May.
Comey, who ran the Federal Bureau of Investigation for nearly four years, portrays the president in the book as a liar, dumb and rude, and he compares elements of Trump's behavior to that of a Mafia boss. "And I don't think it is". "It always struck me, and still strikes me, as unlikely, and I would have been able to say with high confidence about any other president I dealt with, but I can't - it's possible".
During his interview with George Stephanopoulos, Comey discussed his 2016 announcement in which he said the Federal Bureau of Investigation wouldn't recommend criminal charges against Clinton - even though she was, in his view, "extremely careless" with her handling of sensitive data.
Comey told ABC News that he knew the investigation into former Secretary of State Hillary Clinton's use of a private email server was going to present a "no-win situation" for him. "It would depend upon other things that reflected on his intent". Comey announced in July 2016 that he would not recommend charges against Clinton, but stated publicly that Clinton and her aides had been "extremely careless" in handling classified information.
Comey's disclosure shortly before the election that the FBI had reopened its investigation into her email use enraged Democrats.
"I don't remember spelling it out, but it had to have been, that she's going to be elected president and if I hide this from the American people, she'll be illegitimate the moment she's elected, the moment this comes out", Comey said.
Hours before the interview aired, Trump launched into a preemptive tirade on Twitter berating Trump.
"Unbelievably, James Comey states that Polls, where Crooked Hillary (Clinton) was leading, were a factor in the handling (stupidly) of the Clinton Email probe".