next after the sixty-fifth; being the ordinal number for 66.
being one of 66 equal parts.
a sixty-sixth part, especially of one (1/66).
the sixty-sixth member of a series.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use sixty-sixth in a sentence
If he's worried or sad that sixty-sixth sense gets thrown up and becomes more veevid, if ye'll understand me.Tam O' The Scoots | Edgar Wallace
Then enter a low marshy bad country, which grows worse after passing the sixty-sixth milestone, and successive bogs in it.A Tour in Ireland | Arthur Young
He was in the sixty-sixth year of his age, and had seen a great deal of service in India.
At sixty-sixth he came sasshaying right down the car and said 'Hello, patootie!'Jill the Reckless | P. G. (Pelham Grenville) Wodehouse
In his sixty-sixth year he once more displayed something of the magnificent energy of his triumphant youth.