What is another word for "sexagenary"?

Roget's Thesaurus (1911) lists these synonyms for "sexagenary": alone, alter, among, centesimal, certain, decimal, decimate, decimation, deficit, division, duodecimal, few, fifth, five, hundredth, inter, large, majority, millesimal, more, multitude, non, not, number, one, other, pentavalent, plural, plurality, quinquarticular, quinquefid, quinquepartite, several, sexagesimal, some, tenth, than, three, tithe, twelfth.