Fatto generale: 75617 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 75617 is an unremarkable number.
Trivia: 75617 is an unremarkable number.
Data storica: January 12th is the day in 475 that Basiliscus becomes Byzantine Emperor, with a coronation ceremony in the Hebdomon palace in Constantinople.