665092656 has 90 divisors (see below), whose sum is σ = 1946004788. Its totient is φ = 212034240.

The previous prime is 665092651. The next prime is 665092661. The reversal of 665092656 is 656290566.

It is an interprime number because it is at equal distance from previous prime (665092651) and next prime (665092661).

It is not an unprimeable number, because it can be changed into a prime (665092651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 71811 + ... + 80541.

Almost surely, 2^665092656 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 665092656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (973002394).

665092656 is an abundant number, since it is smaller than the sum of its proper divisors (1280912132).

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

665092656 is a wasteful number, since it uses less digits than its factorization.

665092656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8791 (or 8759 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The square root of 665092656 is about 25789.3903766646. The cubic root of 665092656 is about 872.8924104646.

The spelling of 665092656 in words is "six hundred sixty-five million, ninety-two thousand, six hundred fifty-six".