Fait mathématique: 66970 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 66970 is a boring number.
Date historique: May 10th is the day in 1833 that the desecration of the grave of the viceroy of southern Vietnam Le Van Duyet by Emperor Minh Mang provokes his adopted son to start a revolt.