Fatto generale: 61670 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 61670 is an uninteresting number.
Trivia: 61670 is a boring number.
Data storica: November 4th is the day in 1852 that Count Camillo Benso di Cavour becomes the prime minister of Piedmont-Sardinia, which soon expands to become Italy.