90656665 has 16 divisors (see below), whose sum is σ = 125660160. Its totient is φ = 62053120.

The previous prime is 90656651. The next prime is 90656669. The reversal of 90656665 is 56665609.

It is not a de Polignac number, because 90656665 - 2⁵ = 90656633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90656669) 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, 47545 + ... + 49414.

It is an arithmetic number, because the mean of its divisors is an integer number (7853760).

Almost surely, 2^90656665 is an apocalyptic number.

It is an amenable number.

90656665 is a deficient number, since it is larger than the sum of its proper divisors (35003495).

90656665 is a wasteful number, since it uses less digits than its factorization.

90656665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96992.

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 90656665 is about 9521.3793643568. The cubic root of 90656665 is about 449.2277536933.

The spelling of 90656665 in words is "ninety million, six hundred fifty-six thousand, six hundred sixty-five".