Hecho general: 6490 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 6490 is the number of ways to place 2 non-attacking bishops on a 11×11 chessboard.
Trivia: 6490 is an unremarkable number.
Fecha histórica: October 7th is the day in 1862 that Royal Columbian Hospital (RCH) opens as the first hospital in the Canadian province of British Columbia.