Fait mathématique: 91671 is an uninteresting number.
Culture générale: 91671 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: December 26th is the day in 2006 that a 7.1 magnitude earthquake hit Hengchun, Pingtung, Taiwan, killing two people and causing severe communication disruptions in southeast Asia.