Fatto generale: 55606 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 55606 is a boring number.
Trivia: 55606 is an uninteresting number.
Data storica: March 29th is the day in 1961 that the Twenty-third Amendment to the United States Constitution is ratified, allowing residents of Washington, D.C., to vote in presidential elections.