Complete bosh.
Nineteen Eighty-Four should always be written as Nineteen Eighty-Four, because that is the name of the book.
Bolaño’s 2666 should always be written as 2666, because that is the name of the book.
Referring to 2666 as “Two Thousand Six Hundred and Sixty-Six” at the start of a sentence would be completely asinine, because that is not the name of the book. Such a idea could only be pushed by overly rule-loving middle school English teachers.