656600672 has 96 divisors (see below), whose sum is σ = 1597704192. Its totient is φ = 258660864.

The previous prime is 656600671. The next prime is 656600701. The reversal of 656600672 is 276006656.

It is a super-2 number, since 2×656600672² = 862248884941703168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656600671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1348013 + ... + 1348499.

It is an arithmetic number, because the mean of its divisors is an integer number (16642752).

Almost surely, 2^656600672 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 656600672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (798852096).

656600672 is an abundant number, since it is smaller than the sum of its proper divisors (941103520).

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

656600672 is a wasteful number, since it uses less digits than its factorization.

656600672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980 (or 972 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 656600672 is about 25624.2204174098. The cubic root of 656600672 is about 869.1614203534.

The spelling of 656600672 in words is "six hundred fifty-six million, six hundred thousand, six hundred seventy-two".