66572392 has 8 divisors (see below), whose sum is σ = 124823250. Its totient is φ = 33286192.

The previous prime is 66572383. The next prime is 66572417. The reversal of 66572392 is 29327566.

It can be written as a sum of positive squares in only one way, i.e., 36168196 + 30404196 = 6014^2 + 5514^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4160767 + ... + 4160782.

Almost surely, 2^66572392 is an apocalyptic number.

It is an amenable number.

66572392 is a deficient number, since it is larger than the sum of its proper divisors (58250858).

66572392 is a wasteful number, since it uses less digits than its factorization.

66572392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8321555 (or 8321551 counting only the distinct ones).

The product of its digits is 136080, while the sum is 40.

The square root of 66572392 is about 8159.1906461364. The cubic root of 66572392 is about 405.2889103507.

The spelling of 66572392 in words is "sixty-six million, five hundred seventy-two thousand, three hundred ninety-two".