663217672113 has 12 divisors (see below), whose sum is σ = 983872463028. Its totient is φ = 430195246560.

The previous prime is 663217672049. The next prime is 663217672141. The reversal of 663217672113 is 311276712366.

663217672113 is a `hidden beast` number, since 6 + 632 + 1 + 7 + 6 + 7 + 2 + 1 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 400476340224 + 262741331889 = 632832^2 + 512583^2 .

It is not a de Polignac number, because 663217672113 - 2⁶ = 663217672049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663217672193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 995821998 + ... + 995822663.

It is an arithmetic number, because the mean of its divisors is an integer number (81989371919).

Almost surely, 2^663217672113 is an apocalyptic number.

It is an amenable number.

663217672113 is a deficient number, since it is larger than the sum of its proper divisors (320654790915).

663217672113 is a wasteful number, since it uses less digits than its factorization.

663217672113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991644704 (or 1991644701 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The spelling of 663217672113 in words is "six hundred sixty-three billion, two hundred seventeen million, six hundred seventy-two thousand, one hundred thirteen".