656220967 has 4 divisors (see below), whose sum is σ = 659037600. Its totient is φ = 653404336.

The previous prime is 656220959. The next prime is 656221039. The reversal of 656220967 is 769022656.

656220967 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 656220967 - 2³ = 656220959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656220167) 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, 1407967 + ... + 1408432.

It is an arithmetic number, because the mean of its divisors is an integer number (164759400).

Almost surely, 2^656220967 is an apocalyptic number.

656220967 is a deficient number, since it is larger than the sum of its proper divisors (2816633).

656220967 is a wasteful number, since it uses less digits than its factorization.

656220967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816632.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 656220967 is about 25616.8102424951. The cubic root of 656220967 is about 868.9938458604.

The spelling of 656220967 in words is "six hundred fifty-six million, two hundred twenty thousand, nine hundred sixty-seven".