8659664 has 80 divisors (see below), whose sum is σ = 19998720. Its totient is φ = 3594240.

The previous prime is 8659663. The next prime is 8659667. The reversal of 8659664 is 4669568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8659663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109577 + ... + 109655.

It is an arithmetic number, because the mean of its divisors is an integer number (249984).

Almost surely, 2^8659664 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 8659664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9999360).

8659664 is an abundant number, since it is smaller than the sum of its proper divisors (11339056).

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

8659664 is a wasteful number, since it uses less digits than its factorization.

8659664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 142 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 8659664 is about 2942.7307046347. The cubic root of 8659664 is about 205.3526667952.

The spelling of 8659664 in words is "eight million, six hundred fifty-nine thousand, six hundred sixty-four".