20117667660663 has 16 divisors (see below), whose sum is σ = 26926196774400. Its totient is φ = 13360469324640.

The previous prime is 20117667660619. The next prime is 20117667660691. The reversal of 20117667660663 is 36606676671102.

It is a happy number.

It is not a de Polignac number, because 20117667660663 - 2¹⁸ = 20117667398519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117667667663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6106758 + ... + 8804988.

It is an arithmetic number, because the mean of its divisors is an integer number (1682887298400).

Almost surely, 2^{20117667660663} is an apocalyptic number.

20117667660663 is a deficient number, since it is larger than the sum of its proper divisors (6808529113737).

20117667660663 is a wasteful number, since it uses less digits than its factorization.

20117667660663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707742.

The product of its (nonzero) digits is 13716864, while the sum is 57.

The spelling of 20117667660663 in words is "twenty trillion, one hundred seventeen billion, six hundred sixty-seven million, six hundred sixty thousand, six hundred sixty-three".