General fact: 65900 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 65900 is an unremarkable number.
Trivia: 65900 is an uninteresting number.
Historical date: June 4th is the day in 1965 that Duane Earl Pope robbed the Farmers' State Bank of Big Springs, Nebraska, killing three people execution style and severely wounding a fourth.