90666645 has 16 divisors (see below), whose sum is σ = 147111552. Its totient is φ = 47673920.

The previous prime is 90666629. The next prime is 90666683. The reversal of 90666645 is 54666609.

It is not a de Polignac number, because 90666645 - 2⁴ = 90666629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90666597 and 90666606.

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, 41502 + ... + 43631.

It is an arithmetic number, because the mean of its divisors is an integer number (9194472).

Almost surely, 2^90666645 is an apocalyptic number.

It is an amenable number.

90666645 is a deficient number, since it is larger than the sum of its proper divisors (56444907).

90666645 is a wasteful number, since it uses less digits than its factorization.

90666645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85212.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 90666645 is about 9521.9034336628. The cubic root of 90666645 is about 449.2442376016.

The spelling of 90666645 in words is "ninety million, six hundred sixty-six thousand, six hundred forty-five".