656059768 has 64 divisors (see below), whose sum is σ = 1521515520. Its totient is φ = 258249600.

The previous prime is 656059757. The next prime is 656059777. The reversal of 656059768 is 867950656.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151473 + ... + 155743.

It is an arithmetic number, because the mean of its divisors is an integer number (23773680).

Almost surely, 2^656059768 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 656059768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (760757760).

656059768 is an abundant number, since it is smaller than the sum of its proper divisors (865455752).

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

656059768 is a wasteful number, since it uses less digits than its factorization.

656059768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508 (or 4504 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The square root of 656059768 is about 25613.6636973315. The cubic root of 656059768 is about 868.9226846623.

The spelling of 656059768 in words is "six hundred fifty-six million, fifty-nine thousand, seven hundred sixty-eight".