Fait mathématique: 85866 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 85866 is an unremarkable number.
Date historique: February 3rd is the day in 1488 that Bartolomeu Dias of Portugal lands in Mossel Bay after rounding the Cape of Good Hope, becoming the first known European to travel so far south.