66504552 has 16 divisors (see below), whose sum is σ = 166261440. Its totient is φ = 22168176.

The previous prime is 66504539. The next prime is 66504587. The reversal of 66504552 is 25540566.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385488 + ... + 1385535.

It is an arithmetic number, because the mean of its divisors is an integer number (10391340).

Almost surely, 2^66504552 is an apocalyptic number.

It is an amenable number.

66504552 is an abundant number, since it is smaller than the sum of its proper divisors (99756888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66504552 is a wasteful number, since it uses less digits than its factorization.

66504552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771032 (or 2771028 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 66504552 is about 8155.0323114013. The cubic root of 66504552 is about 405.1511948824.

The spelling of 66504552 in words is "sixty-six million, five hundred four thousand, five hundred fifty-two".