8380664865 has 16 divisors (see below), whose sum is σ = 14898960000. Its totient is φ = 4469687856.

The previous prime is 8380664857. The next prime is 8380664933. The reversal of 8380664865 is 5684660838.

8380664865 is a `hidden beast` number, since 83 + 80 + 6 + 6 + 486 + 5 = 666.

It is not a de Polignac number, because 8380664865 - 2³ = 8380664857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31039365 + ... + 31039634.

It is an arithmetic number, because the mean of its divisors is an integer number (931185000).

Almost surely, 2^8380664865 is an apocalyptic number.

It is an amenable number.

8380664865 is a deficient number, since it is larger than the sum of its proper divisors (6518295135).

8380664865 is a wasteful number, since it uses less digits than its factorization.

8380664865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62079013 (or 62079007 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The square root of 8380664865 is about 91545.9713204246. The cubic root of 8380664865 is about 2031.2318200945.

The spelling of 8380664865 in words is "eight billion, three hundred eighty million, six hundred sixty-four thousand, eight hundred sixty-five".