Fatto generale: 66435 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 66435 is an uninteresting number.
Trivia: 66435 is an unremarkable number.
Data storica: November 21st is the day in 1990 that the Charter of Paris for a New Europe refocuses the efforts of the Conference for Security and Co-operation in Europeon post-Cold War issues.