566540 has 24 divisors (see below), whose sum is σ = 1281840. Its totient is φ = 209088.

The previous prime is 566539. The next prime is 566543. The reversal of 566540 is 45665.

566540 = 101² + 102² + ... + 139².

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 566540.

It is not an unprimeable number, because it can be changed into a prime (566543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830 + ... + 1349.

It is an arithmetic number, because the mean of its divisors is an integer number (53410).

2⁵⁶⁶⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

566540 is an abundant number, since it is smaller than the sum of its proper divisors (715300).

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

566540 is a wasteful number, since it uses less digits than its factorization.

566540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201 (or 2199 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 566540 is about 752.6885145929. The cubic root of 566540 is about 82.7453364294.

The spelling of 566540 in words is "five hundred sixty-six thousand, five hundred forty".