20117113800666 has 16 divisors (see below), whose sum is σ = 40238003109504. Its totient is φ = 6705075348864.

The previous prime is 20117113800659. The next prime is 20117113800677. The reversal of 20117113800666 is 66600831171102.

It is a super-3 number, since 3×20117113800666³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157243570 + ... + 157371453.

It is an arithmetic number, because the mean of its divisors is an integer number (2514875194344).

Almost surely, 2^{20117113800666} is an apocalyptic number.

20117113800666 is an abundant number, since it is smaller than the sum of its proper divisors (20120889308838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20117113800666 is a wasteful number, since it uses less digits than its factorization.

20117113800666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314625685.

The product of its (nonzero) digits is 72576, while the sum is 42.

Adding to 20117113800666 its reverse (66600831171102), we get a palindrome (86717944971768).

The spelling of 20117113800666 in words is "twenty trillion, one hundred seventeen billion, one hundred thirteen million, eight hundred thousand, six hundred sixty-six".