8664687 has 6 divisors (see below), whose sum is σ = 12515672. Its totient is φ = 5776452.

The previous prime is 8664671. The next prime is 8664701. The reversal of 8664687 is 7864668.

It is a happy number.

8664687 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8664687 - 2⁴ = 8664671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8664787) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 481363 + ... + 481380.

Almost surely, 2^8664687 is an apocalyptic number.

8664687 is a deficient number, since it is larger than the sum of its proper divisors (3850985).

8664687 is a wasteful number, since it uses less digits than its factorization.

8664687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962749 (or 962746 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 8664687 is about 2943.5840399078. The cubic root of 8664687 is about 205.3923637578.

The spelling of 8664687 in words is "eight million, six hundred sixty-four thousand, six hundred eighty-seven".