Fait mathématique: 6607 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 6607 is an unremarkable number.
Date historique: February 1st is the day in 1876 that a murder conviction effectively forces the violent Pennsylvanian Irish anti-owner coal miners, the "Molly Maguires", to disband.