57506566 has 16 divisors (see below), whose sum is σ = 95057424. Its totient is φ = 25923744.

The previous prime is 57506557. The next prime is 57506567. The reversal of 57506566 is 66560575.

It is a super-2 number, since 2×57506566² = 6614010266224712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57506567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24601 + ... + 26836.

It is an arithmetic number, because the mean of its divisors is an integer number (5941089).

Almost surely, 2^57506566 is an apocalyptic number.

57506566 is a deficient number, since it is larger than the sum of its proper divisors (37550858).

57506566 is a wasteful number, since it uses less digits than its factorization.

57506566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51495.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 57506566 is about 7583.3083809113. The cubic root of 57506566 is about 385.9868224626.

The spelling of 57506566 in words is "fifty-seven million, five hundred six thousand, five hundred sixty-six".