656607090 has 32 divisors (see below), whose sum is σ = 1582467840. Its totient is φ = 174360704.

The previous prime is 656607043. The next prime is 656607101. The reversal of 656607090 is 90706656.

It is a happy number.

It is a super-2 number, since 2×656607090² = 862265741276536200, which contains 22 as substring.

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, 38619 + ... + 52958.

It is an arithmetic number, because the mean of its divisors is an integer number (49452120).

Almost surely, 2^656607090 is an apocalyptic number.

656607090 is an abundant number, since it is smaller than the sum of its proper divisors (925860750).

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

656607090 is a wasteful number, since it uses less digits than its factorization.

656607090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91826.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 656607090 is about 25624.3456501820. The cubic root of 656607090 is about 869.1642522419.

The spelling of 656607090 in words is "six hundred fifty-six million, six hundred seven thousand, ninety".