Hecho general: 5377 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 5377 is an unremarkable number.
Trivia: 5377 is an uninteresting number.
Fecha histórica: September 20th is the day in 1984 that a suicide bomber in a car attacks the U.S. embassy in Beirut, Lebanon, killing twenty-two people.