90918665 has 16 divisors (see below), whose sum is σ = 111654912. Its totient is φ = 71051904.

The previous prime is 90918647. The next prime is 90918671. The reversal of 90918665 is 56681909.

It is a cyclic number.

It is not a de Polignac number, because 90918665 - 2¹⁶ = 90853129 is a prime.

It is a Duffinian 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, 41477 + ... + 43613.

It is an arithmetic number, because the mean of its divisors is an integer number (6978432).

Almost surely, 2^90918665 is an apocalyptic number.

It is an amenable number.

90918665 is a deficient number, since it is larger than the sum of its proper divisors (20736247).

90918665 is a wasteful number, since it uses less digits than its factorization.

90918665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 90918665 is about 9535.1279488007. The cubic root of 90918665 is about 449.6600972321.

The spelling of 90918665 in words is "ninety million, nine hundred eighteen thousand, six hundred sixty-five".