Fatto generale: 2606 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2606 is the number of polyhedra with 9 vertices.
Trivia: 2606 is a boring number.
Data storica: February 18th is the day in 1913 that Pedro Lascuráin becomes President of Mexico for 45 minutes; this is the shortest term to date of any person as president of any country.