13 and 666

Triskaidekaphobia is the fear of the number 13. Many American buildings skip the number 13 when numbering floors.
Hexakosioihexekontahexaphobia is the fear of the number 666, which some consider the Number Of The Beast.
No building is tall enough to have a six hundred and sixty-sixth floor to skip, but Ronald and Nancy Reagan had their house number changed to 668 because of that fear.
Golf courses, on the other hand, have thirteenth holes, so I suppose if there were 666 holes, those would be numbered properly, too.
I’d hate to have to mow the grass on that course, though.