Fatto matematico: 8669 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 18 stamps.
Trivia: 8669 is an unremarkable number.
Data storica: September 25th is the day in 1690 that Publick Occurrences Both Foreign and Domestick, the first newspaper to appear in the Americas, is published for the first and only time.