odds of hitting #22 four times in a row: 1 in 2,085,136. Odds of hitting any number four times in a row: 1 in 54,872 (it's lower because you are starting with any number, not a designated number).
I was talking with a dealer last week who saw a designated number hit 5 times in a row (1 in 79,235,168).
Odds someone will question my math: 1 in 1.
I like to play repeating numbers - after all, how many times to do hear "number 5 again???"