Fait général: 66558 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 66558 is an unremarkable number.
Culture générale: 66558 is an unremarkable number.
Date historique: March 24th is the day in 1882 that Robert Koch announces the discovery of mycobacterium tuberculosis, the bacterium responsible for tuberculosis.