Fait général: 8557 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 8557 is a boring number.
Culture générale: 8557 is an uninteresting number.
Date historique: June 5th is the day in 1989 that the Unknown Rebel halts the progress of a column of advancing tanks for over half an hour after the Tiananmen Square protests of 1989.