656707216 has 40 divisors (see below), whose sum is σ = 1392169824. Its totient is φ = 297615360.

The previous prime is 656707213. The next prime is 656707253. The reversal of 656707216 is 612707656.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (656707213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55696 + ... + 66448.

Almost surely, 2^656707216 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 656707216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696084912).

656707216 is an abundant number, since it is smaller than the sum of its proper divisors (735462608).

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

656707216 is a wasteful number, since it uses less digits than its factorization.

656707216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11119 (or 11113 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 656707216 is about 25626.2993036451. The cubic root of 656707216 is about 869.2084296087.

The spelling of 656707216 in words is "six hundred fifty-six million, seven hundred seven thousand, two hundred sixteen".