classic funny

i was at the store again last night and this gentleman bought a case of beers for $13.34. he handed me a $20 bill and the register popped up with the ominous $6.66.
we joked about it and he ended up taking $6.65. before he did however, he muttered something to his mate that i do not believe he fully appreciated the humour of.
he said:

665
the neighbour of The Beast

classic.