Fait général: 6475 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 6475 is a value of n for which p(n) is the product of the digits of n.
Culture générale: 6475 is an uninteresting number.
Date historique: September 22nd is the day in 1910 that the Duke of York's Picture House opens in Brighton, now the oldest continually operating cinema in Britain.