57009666 has 32 divisors (see below), whose sum is σ = 130572288. Its totient is φ = 16255440.

The previous prime is 57009643. The next prime is 57009677. The reversal of 57009666 is 66690075.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25951 + ... + 28061.

It is an arithmetic number, because the mean of its divisors is an integer number (4080384).

Almost surely, 2^57009666 is an apocalyptic number.

57009666 is an abundant number, since it is smaller than the sum of its proper divisors (73562622).

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

57009666 is a wasteful number, since it uses less digits than its factorization.

57009666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 57009666 is about 7550.4745546224. The cubic root of 57009666 is about 384.8718660571.

It can be divided in two parts, 57009 and 666, that added together give a palindrome (57675).

The spelling of 57009666 in words is "fifty-seven million, nine thousand, six hundred sixty-six".