57253666 has 4 divisors (see below), whose sum is σ = 85880502. Its totient is φ = 28626832.

The previous prime is 57253663. The next prime is 57253673. The reversal of 57253666 is 66635275.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 52258441 + 4995225 = 7229^2 + 2235^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (57253663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14313415 + ... + 14313418.

Almost surely, 2^57253666 is an apocalyptic number.

57253666 is a deficient number, since it is larger than the sum of its proper divisors (28626836).

57253666 is a wasteful number, since it uses less digits than its factorization.

57253666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28626835.

The product of its digits is 226800, while the sum is 40.

The square root of 57253666 is about 7566.6152274316. The cubic root of 57253666 is about 385.4201653418.

The spelling of 57253666 in words is "fifty-seven million, two hundred fifty-three thousand, six hundred sixty-six".