656656655 has 8 divisors (see below), whose sum is σ = 806313552. Its totient is φ = 513108288.

The previous prime is 656656633. The next prime is 656656691. The reversal of 656656655 is 556656656.

It is a happy number.

656656655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656656655 - 2²² = 652462351 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 1526894 + ... + 1527323.

It is an arithmetic number, because the mean of its divisors is an integer number (100789194).

Almost surely, 2^656656655 is an apocalyptic number.

656656655 is a deficient number, since it is larger than the sum of its proper divisors (149656897).

656656655 is a wasteful number, since it uses less digits than its factorization.

656656655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054265.

The product of its digits is 4860000, while the sum is 50.

The square root of 656656655 is about 25625.3127785789. The cubic root of 656656655 is about 869.1861217602.

Subtracting from 656656655 its reverse (556656656), we obtain a palindrome (99999999).

The spelling of 656656655 in words is "six hundred fifty-six million, six hundred fifty-six thousand, six hundred fifty-five".