656568966 has 16 divisors (see below), whose sum is σ = 1313733888. Its totient is φ = 218757000.

The previous prime is 656568953. The next prime is 656568977. The reversal of 656568966 is 669865656.

It is a super-2 number, since 2×656568966² = 862165614228618312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9810 + ... + 37541.

It is an arithmetic number, because the mean of its divisors is an integer number (82108368).

Almost surely, 2^656568966 is an apocalyptic number.

656568966 is an abundant number, since it is smaller than the sum of its proper divisors (657164922).

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

656568966 is a wasteful number, since it uses less digits than its factorization.

656568966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49667.

The product of its digits is 13996800, while the sum is 57.

The square root of 656568966 is about 25623.6017374607. The cubic root of 656568966 is about 869.1474300765.

The spelling of 656568966 in words is "six hundred fifty-six million, five hundred sixty-eight thousand, nine hundred sixty-six".