1. sixty-sixth - Noun
2. sixty-sixth - Adjective
sixty-sixth
The ordinal form of the number sixty-six, describing a person or thing in position number 66 of a sequence.
The answer appears on the sixty-sixth page of the book.
She finished sixty-sixth in the race.
sixty-sixth (plural sixty-sixths)
One of sixty-six equal parts of a whole.
A sixty-sixth of 1320 is 20.