Fatto generale: 63907 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 63907 is an unremarkable number.
Trivia: 63907 is a boring number.
Data storica: December 20th is the day in 2007 that Elizabeth II becomes the oldest ever monarch of the United Kingdom, surpassing Queen Victoria, who lived for 81 years, 7 months and 29 days.