656122670 has 32 divisors (see below), whose sum is σ = 1360060416. Its totient is φ = 223236000.

The previous prime is 656122661. The next prime is 656122693. The reversal of 656122670 is 76221656.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 656122670.

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, 26606 + ... + 44945.

It is an arithmetic number, because the mean of its divisors is an integer number (42501888).

Almost surely, 2^656122670 is an apocalyptic number.

656122670 is an abundant number, since it is smaller than the sum of its proper divisors (703937746).

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

656122670 is a wasteful number, since it uses less digits than its factorization.

656122670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71696.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 656122670 is about 25614.8915672114. The cubic root of 656122670 is about 868.9504540976.

The spelling of 656122670 in words is "six hundred fifty-six million, one hundred twenty-two thousand, six hundred seventy".