‘Anus’ (πρωκτός) and ‘gold’ (χρυσός) have the same numerical value: I once discovered this while casually calculating (Greek Anthology 12.6).
The commonest number system for the ancient Greeks assigned numerical values to letters of the alphabet, so it was possible for a word to have a numerical value (i.e. the sum of the values of each letter in the word). I think πρωκτός and χρυσός both have a value of 1570. Some people wrote poems in which each verse or couplet had the same value, and apparently some people calculated the values of words to kill time.