Fatto generale: 67631 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 67631 is an unremarkable number.
Trivia: 67631 is a boring number.
Data storica: March 1st is the day in 1964 that Villarrica Volcano begins a strombolian eruption causing lahars that destroy half of the town of Coñaripe.