8649664 has 14 divisors (see below), whose sum is σ = 17164304. Its totient is φ = 4324800.

The previous prime is 8649661. The next prime is 8649671. The reversal of 8649664 is 4669468.

8649664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 8649664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8649661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67512 + ... + 67639.

Almost surely, 2^8649664 is an apocalyptic number.

It is an amenable number.

8649664 is a deficient number, since it is larger than the sum of its proper divisors (8514640).

8649664 is a wasteful number, since it uses less digits than its factorization.

8649664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135163 (or 135153 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 8649664 is about 2941.0311117022. The cubic root of 8649664 is about 205.2735906851.

The spelling of 8649664 in words is "eight million, six hundred forty-nine thousand, six hundred sixty-four".