six•ty-sixthPronunciation: (siks'tē-siksth'), [key]
next after the sixty-fifth; being the ordinal number for 66.
being one of 66 equal parts.
a sixty-sixth part, esp. of one (1/66
the sixty-sixth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.