8664257 has 16 divisors (see below), whose sum is σ = 10213632. Its totient is φ = 7197120.

The previous prime is 8664223. The next prime is 8664259. The reversal of 8664257 is 7524668.

It is a happy number.

8664257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8664257 - 2⁶ = 8664193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8664257.

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 15 ways as a sum of consecutive naturals, for example, 43883 + ... + 44079.

It is an arithmetic number, because the mean of its divisors is an integer number (638352).

Almost surely, 2^8664257 is an apocalyptic number.

It is an amenable number.

8664257 is a deficient number, since it is larger than the sum of its proper divisors (1549375).

8664257 is a wasteful number, since it uses less digits than its factorization.

8664257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368.

The product of its digits is 80640, while the sum is 38.

The square root of 8664257 is about 2943.5109987904. The cubic root of 8664257 is about 205.3889660518.

The spelling of 8664257 in words is "eight million, six hundred sixty-four thousand, two hundred fifty-seven".