8664659 has 4 divisors (see below), whose sum is σ = 8708400. Its totient is φ = 8620920.

The previous prime is 8664613. The next prime is 8664661. The reversal of 8664659 is 9564668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8664659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8664259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21572 + ... + 21969.

It is an arithmetic number, because the mean of its divisors is an integer number (2177100).

Almost surely, 2^8664659 is an apocalyptic number.

8664659 is a deficient number, since it is larger than the sum of its proper divisors (43741).

8664659 is a wasteful number, since it uses less digits than its factorization.

8664659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43740.

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

The square root of 8664659 is about 2943.5792837972. The cubic root of 8664659 is about 205.3921425153.

Subtracting 8664659 from its reverse (9564668), we obtain a palindrome (900009).

The spelling of 8664659 in words is "eight million, six hundred sixty-four thousand, six hundred fifty-nine".