17 is associated with bad luck in Italian superstition.
Ironically, the prize for 2 correct final digits in the German lottery Spiel 77 is equal to 17 euros.
In googology Edit
In Greek-based naming systems, 17 is associated with prefix "heptadeka-", and with prefix "septendeci-" in Latin systems.
17 is the 6th output of the Xi function, \(\Xi(6) = 17\).