Yes.. When I saw it I thought "Wow, a hundred dollar bill. I will quickly go grocery shopping with it before I lose it!"
There is very little interest within the currency collecting community for “666” notes. There are probably a small number of people who collect them and might pay a small premium, but the notes aren’t rare nor is there much of a demand to justify a premium. Approx 1 in 1000 notes will have at least three 6’s in sequence. Considering there billions of notes in circulation, there are millions of 666 notes out there. Even if somebody collected 666 notes, why would they pay extra for one when they could go to the bank and find them for face value? If you want to collect them because you find them interesting, then they are collectable. If you’re asking because you want to sell it, well, maybe not so collectable
Check your serial numbers here https://www.mycurrencycollection.com/reference/fancy-serial-number-checker