557566 has 24 divisors (see below), whose sum is σ = 955584. Its totient is φ = 242880.

The previous prime is 557551. The next prime is 557567. The reversal of 557566 is 665755.

557566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557567) by changing a digit.

557566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17971 + ... + 18001.

It is an arithmetic number, because the mean of its divisors is an integer number (39816).

2⁵⁵⁷⁵⁶⁶ is an apocalyptic number.

557566 is a deficient number, since it is larger than the sum of its proper divisors (398018).

557566 is a wasteful number, since it uses less digits than its factorization.

557566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 73 counting only the distinct ones).

The product of its digits is 31500, while the sum is 34.

The square root of 557566 is about 746.7034217144. The cubic root of 557566 is about 82.3061134137.

The spelling of 557566 in words is "five hundred fifty-seven thousand, five hundred sixty-six".