Hecho general: 7474 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 7474 is a boring number.
Trivia: 7474 is an unremarkable number.
Fecha histórica: June 17th is the day in 1940 that the three Baltic states of Estonia, Latvia and Lithuania fall under the occupation of the Soviet Union.