665174472813 has 24 divisors (see below), whose sum is σ = 977192648640. Its totient is φ = 435888847680.

The previous prime is 665174472719. The next prime is 665174472827. The reversal of 665174472813 is 318274471566.

665174472813 is a `hidden beast` number, since 6 + 6 + 517 + 4 + 47 + 2 + 81 + 3 = 666.

It is not a de Polignac number, because 665174472813 - 2¹⁰ = 665174471789 is a prime.

It is a super-2 number, since 2×665174472813² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 665174472813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665174472863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5586145 + ... + 5703977.

It is an arithmetic number, because the mean of its divisors is an integer number (40716360360).

Almost surely, 2^665174472813 is an apocalyptic number.

It is an amenable number.

665174472813 is a deficient number, since it is larger than the sum of its proper divisors (312018175827).

665174472813 is a wasteful number, since it uses less digits than its factorization.

665174472813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128529 (or 128526 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The spelling of 665174472813 in words is "six hundred sixty-five billion, one hundred seventy-four million, four hundred seventy-two thousand, eight hundred thirteen".