8664385 has 8 divisors (see below), whose sum is σ = 10428840. Its totient is φ = 6910464.

The previous prime is 8664377. The next prime is 8664389. The reversal of 8664385 is 5834668.

It can be written as a sum of positive squares in 4 ways, for example, as 2961841 + 5702544 = 1721^2 + 2388^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8664385 - 2³ = 8664377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8664389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 690 + ... + 4219.

It is an arithmetic number, because the mean of its divisors is an integer number (1303605).

Almost surely, 2^8664385 is an apocalyptic number.

It is an amenable number.

8664385 is a deficient number, since it is larger than the sum of its proper divisors (1764455).

8664385 is a wasteful number, since it uses less digits than its factorization.

8664385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5267.

The product of its digits is 138240, while the sum is 40.

The square root of 8664385 is about 2943.5327414520. The cubic root of 8664385 is about 205.3899774737.

The spelling of 8664385 in words is "eight million, six hundred sixty-four thousand, three hundred eighty-five".