Fatto matematico: 2659 is the maximum value of n so that there exist 5 denominations of stamps so that every postage from 1 to n can be paid for with at most 13 stamps.
Trivia: 2659 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: April 12th is the day in 1557 that Cuenca is founded in Ecuador.