Fatto generale: 2665 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2665 is the number of conjugacy classes in the automorphism group of the 14 dimensional hypercube.
Trivia: 2665 is a boring number.
Data storica: April 18th is the day in 1961 that CONCP is founded in Casablanca as a united front of African movements opposing Portuguese colonial rule.