sixty-fourth
[ siks-tee-fawrth, -fohrth ]
/ ˈsɪks tiˈfɔrθ, -ˈfoʊrθ /
adjective
next after the sixty-third; being the ordinal number for 64.
being one of 64 equal parts.
noun
a sixty-fourth part, especially of one (1/64).
the sixty-fourth member of a series.