2656566 has 24 divisors (see below), whose sum is σ = 6279624. Its totient is φ = 804960.

The previous prime is 2656553. The next prime is 2656601. The reversal of 2656566 is 6656562.

It is a self number, because there is not a number n which added to its sum of digits gives 2656566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6511 + ... + 6906.

It is an arithmetic number, because the mean of its divisors is an integer number (261651).

2^2656566 is an apocalyptic number.

2656566 is an abundant number, since it is smaller than the sum of its proper divisors (3623058).

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

2656566 is a wasteful number, since it uses less digits than its factorization.

2656566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436 (or 13433 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 2656566 is about 1629.8975427922. The cubic root of 2656566 is about 138.4969480662.

The spelling of 2656566 in words is "two million, six hundred fifty-six thousand, five hundred sixty-six".