8065801665 has 64 divisors (see below), whose sum is σ = 14535763200. Its totient is φ = 4243041792.

The previous prime is 8065801651. The next prime is 8065801687. The reversal of 8065801665 is 5661085608.

8065801665 is a `hidden beast` number, since 8 + 0 + 6 + 580 + 1 + 6 + 65 = 666.

It is not a de Polignac number, because 8065801665 - 2⁸ = 8065801409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8065801665.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9455379 + ... + 9456231.

It is an arithmetic number, because the mean of its divisors is an integer number (227121300).

Almost surely, 2^8065801665 is an apocalyptic number.

It is an amenable number.

8065801665 is a deficient number, since it is larger than the sum of its proper divisors (6469961535).

8065801665 is a wasteful number, since it uses less digits than its factorization.

8065801665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743 (or 1737 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 8065801665 is about 89809.8082895181. The cubic root of 8065801665 is about 2005.4685061757.

The spelling of 8065801665 in words is "eight billion, sixty-five million, eight hundred one thousand, six hundred sixty-five".