656886672 has 200 divisors, whose sum is σ = 2070311936. Its totient is φ = 199874304.

The previous prime is 656886667. The next prime is 656886673. The reversal of 656886672 is 276688656.

656886672 is a `hidden beast` number, since 6 + 568 + 8 + 6 + 6 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (656886673) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2139543 + ... + 2139849.

Almost surely, 2^656886672 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 656886672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1035155968).

656886672 is an abundant number, since it is smaller than the sum of its proper divisors (1413425264).

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

656886672 is a wasteful number, since it uses less digits than its factorization.

656886672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 452 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 656886672 is about 25629.8004674246. The cubic root of 656886672 is about 869.2875975433.

The spelling of 656886672 in words is "six hundred fifty-six million, eight hundred eighty-six thousand, six hundred seventy-two".