Why is the number "64" used a lot, i.e., the 64 dollar question, etc. Why not use 63 or 21?

Question

I'm curious about the importance of the number 64......in "the 64 dollar question"......why 64 in the first place?

Answer 1

Because it is a power of 2 (doubling, doubling, doubling, etc.)

1, 2, 4, 8, 16, 32, 64

There was an old radio show (in the 1950s I believe) where the prize money would double for each question. The final prize was $64 and the show was therefore called the "64 Dollar Question".

Later versions of a similar show on TV became the $64,000 question, but again based on the doubling of the prize money.

Interestingly the phrase started even before the radio show in the 30s or 40s, so I'm not exactly sure why it became popular amount. It could be because the power of 2, or it could have just been a number people liked. But later on it was definitely because 64 = 2^6