8664705 has 64 divisors (see below), whose sum is σ = 18040320. Its totient is φ = 3863808.

The previous prime is 8664701. The next prime is 8664731. The reversal of 8664705 is 5074668.

It is a happy number.

8664705 is a `hidden beast` number, since 8 + 6 + 647 + 0 + 5 = 666.

It is not a de Polignac number, because 8664705 - 2² = 8664701 is a prime.

It is a super-2 number, since 2×8664705² = 150154225474050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8664705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8664701) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 49999 + ... + 50171.

It is an arithmetic number, because the mean of its divisors is an integer number (281880).

Almost surely, 2^8664705 is an apocalyptic number.

It is an amenable number.

8664705 is an abundant number, since it is smaller than the sum of its proper divisors (9375615).

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

8664705 is a wasteful number, since it uses less digits than its factorization.

8664705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 8664705 is about 2943.5870974034. The cubic root of 8664705 is about 205.3925059849.

The spelling of 8664705 in words is "eight million, six hundred sixty-four thousand, seven hundred five".