6656556 has 24 divisors (see below), whose sum is σ = 15649200. Its totient is φ = 2202112.

The previous prime is 6656549. The next prime is 6656561. The reversal of 6656556 is 6556566.

It is a happy number.

It is a super-2 number, since 2×6656556² = 88619475562272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381 + ... + 3668.

It is an arithmetic number, because the mean of its divisors is an integer number (652050).

Almost surely, 2^6656556 is an apocalyptic number.

It is an amenable number.

6656556 is an abundant number, since it is smaller than the sum of its proper divisors (8992644).

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

6656556 is a wasteful number, since it uses less digits than its factorization.

6656556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193 (or 4191 counting only the distinct ones).

The product of its digits is 162000, while the sum is 39.

The square root of 6656556 is about 2580.0302323810. The cubic root of 6656556 is about 188.1120126206.

The spelling of 6656556 in words is "six million, six hundred fifty-six thousand, five hundred fifty-six".