90664 has 16 divisors (see below), whose sum is σ = 194400. Its totient is φ = 38832.

The previous prime is 90659. The next prime is 90677. The reversal of 90664 is 46609.

It is an unprimeable number.

90664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754 + ... + 865.

It is an arithmetic number, because the mean of its divisors is an integer number (12150).

2⁹⁰⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

90664 is an abundant number, since it is smaller than the sum of its proper divisors (103736).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97200).

90664 is a wasteful number, since it uses less digits than its factorization.

90664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632 (or 1628 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 90664 is about 301.1046329766. The cubic root of 90664 is about 44.9239868988.

The spelling of 90664 in words is "ninety thousand, six hundred sixty-four".