Fatto matematico: 65626 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 65626 is an uninteresting number.
Data storica: September 4th is the day in 1260 that the Sienese Ghibellines, supported by the forces of King Manfred of Sicily, defeat the Florentine Guelphs at Montaperti.