Hecho general: 6981 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 6981 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 6981 is an uninteresting number.
Fecha histórica: February 10th is the day in 1962 that Captured American U2 spy-plane pilot Gary Powers is exchanged for captured Soviet spy Rudolf Abel.