6557564 has 12 divisors (see below), whose sum is σ = 12358584. Its totient is φ = 3026544.

The previous prime is 6557557. The next prime is 6557569. The reversal of 6557564 is 4657556.

It is a super-2 number, since 2×6557564² = 86003291228192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6557569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63002 + ... + 63105.

It is an arithmetic number, because the mean of its divisors is an integer number (1029882).

Almost surely, 2^6557564 is an apocalyptic number.

It is an amenable number.

6557564 is a deficient number, since it is larger than the sum of its proper divisors (5801020).

6557564 is a wasteful number, since it uses less digits than its factorization.

6557564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126124 (or 126122 counting only the distinct ones).

The product of its digits is 126000, while the sum is 38.

The square root of 6557564 is about 2560.7741017122. The cubic root of 6557564 is about 187.1748581303.

The spelling of 6557564 in words is "six million, five hundred fifty-seven thousand, five hundred sixty-four".