Hecho general: 87666 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 87666 is an uninteresting number.
Trivia: 87666 is an uninteresting number.
Fecha histórica: January 8th is the day in 1889 that Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.