5172166665 has 24 divisors (see below), whose sum is σ = 8968639680. Its totient is φ = 2757396384.

The previous prime is 5172166651. The next prime is 5172166673. The reversal of 5172166665 is 5666612715.

It is not a de Polignac number, because 5172166665 - 2¹⁷ = 5172035593 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 5172166665.

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, 99316 + ... + 142154.

It is an arithmetic number, because the mean of its divisors is an integer number (373693320).

Almost surely, 2^5172166665 is an apocalyptic number.

It is an amenable number.

5172166665 is a deficient number, since it is larger than the sum of its proper divisors (3796473015).

5172166665 is a wasteful number, since it uses less digits than its factorization.

5172166665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45533 (or 45530 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 5172166665 is about 71917.7771138680. Note that the first 3 decimals coincide. The cubic root of 5172166665 is about 1729.3816120999.

The spelling of 5172166665 in words is "five billion, one hundred seventy-two million, one hundred sixty-six thousand, six hundred sixty-five".