8636664825 has 24 divisors (see below), whose sum is σ = 15865874400. Its totient is φ = 4606220880.

The previous prime is 8636664797. The next prime is 8636664877. The reversal of 8636664825 is 5284666368.

It is a happy number.

It is not a de Polignac number, because 8636664825 - 2²⁶ = 8569555961 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6396855 + ... + 6398204.

It is an arithmetic number, because the mean of its divisors is an integer number (661078100).

Almost surely, 2^8636664825 is an apocalyptic number.

It is an amenable number.

8636664825 is a deficient number, since it is larger than the sum of its proper divisors (7229209575).

8636664825 is a wasteful number, since it uses less digits than its factorization.

8636664825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12795078 (or 12795067 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 54.

The square root of 8636664825 is about 92933.6581922825. The cubic root of 8636664825 is about 2051.7070710579.

The spelling of 8636664825 in words is "eight billion, six hundred thirty-six million, six hundred sixty-four thousand, eight hundred twenty-five".