9665664 has 32 divisors (see below), whose sum is σ = 25675440. Its totient is φ = 3221760.

The previous prime is 9665657. The next prime is 9665701. The reversal of 9665664 is 4665669.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12202 + ... + 12969.

Almost surely, 2^9665664 is an apocalyptic number.

It is an amenable number.

9665664 is an abundant number, since it is smaller than the sum of its proper divisors (16009776).

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

9665664 is a wasteful number, since it uses less digits than its factorization.

9665664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25188 (or 25176 counting only the distinct ones).

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

The square root of 9665664 is about 3108.9651011229. The cubic root of 9665664 is about 213.0151854985.

The spelling of 9665664 in words is "nine million, six hundred sixty-five thousand, six hundred sixty-four".