Hecho matemático: 99669 is an uninteresting number.
Trivia: 99669 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: November 18th is the day in 1421 that a seawall at the Zuiderzee dike in the Netherlands breaks, flooding 72 villages and killing about 10,000 people.