656630576 has 120 divisors (see below), whose sum is σ = 1650095280. Its totient is φ = 250822656.

The previous prime is 656630567. The next prime is 656630591. The reversal of 656630576 is 675036656.

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 23 ways as a sum of consecutive naturals, for example, 251936 + ... + 254528.

It is an arithmetic number, because the mean of its divisors is an integer number (13750794).

Almost surely, 2^656630576 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656630576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (825047640).

656630576 is an abundant number, since it is smaller than the sum of its proper divisors (993464704).

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

656630576 is a wasteful number, since it uses less digits than its factorization.

656630576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2651 (or 2638 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 44.

The square root of 656630576 is about 25624.8039212010. The cubic root of 656630576 is about 869.1746150848.

The spelling of 656630576 in words is "six hundred fifty-six million, six hundred thirty thousand, five hundred seventy-six".