66304172 has 24 divisors (see below), whose sum is σ = 126803712. Its totient is φ = 30085200.

The previous prime is 66304163. The next prime is 66304187. The reversal of 66304172 is 27140366.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35297 + ... + 37127.

It is an arithmetic number, because the mean of its divisors is an integer number (5283488).

Almost surely, 2^66304172 is an apocalyptic number.

It is an amenable number.

66304172 is a deficient number, since it is larger than the sum of its proper divisors (60499540).

66304172 is a wasteful number, since it uses less digits than its factorization.

66304172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669 (or 2667 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 66304172 is about 8142.7373775654. The cubic root of 66304172 is about 404.7438750451.

The spelling of 66304172 in words is "sixty-six million, three hundred four thousand, one hundred seventy-two".