six•ty-fourthPronunciation: (siks'tē-fôrth', -fōrth'), [key]
next after the sixty-third; being the ordinal number for 64.
being one of 64 equal parts.
a sixty-fourth part, esp. of one (1/64
the sixty-fourth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.