Fait mathématique: 6006 is the number of intersections when all the diagonals of a regular 21-gon are drawn.
Culture générale: 6006 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: June 10th is the day in 1886 that Mount Tarawera in New Zealand erupts, killing 153 people and destroying the famous Pink and White Terraces.