Hecho general: 61709 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 61709 is an unremarkable number.
Trivia: 61709 is an uninteresting number.
Fecha histórica: December 13th is the day in 1967 that Constantine II of Greece attempts an unsuccessful counter-coup against the Regime of the Colonels.