8664656 has 80 divisors (see below), whose sum is σ = 22581888. Its totient is φ = 3110400.

The previous prime is 8664613. The next prime is 8664661. The reversal of 8664656 is 6564668.

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, 15746 + ... + 16286.

Almost surely, 2^8664656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8664656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11290944).

8664656 is an abundant number, since it is smaller than the sum of its proper divisors (13917232).

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

8664656 is a wasteful number, since it uses less digits than its factorization.

8664656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 574 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The square root of 8664656 is about 2943.5787742135. The cubic root of 8664656 is about 205.3921188107.

The spelling of 8664656 in words is "eight million, six hundred sixty-four thousand, six hundred fifty-six".