66221107163 has 8 divisors (see below), whose sum is σ = 66401885760. Its totient is φ = 66040528320.

The previous prime is 66221107123. The next prime is 66221107171. The reversal of 66221107163 is 36170112266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66221107163 - 2⁸ = 66221106907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66221107123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626423 + ... + 724463.

It is an arithmetic number, because the mean of its divisors is an integer number (8300235720).

Almost surely, 2^66221107163 is an apocalyptic number.

66221107163 is a deficient number, since it is larger than the sum of its proper divisors (180778597).

66221107163 is a wasteful number, since it uses less digits than its factorization.

66221107163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99877.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 66221107163 in words is "sixty-six billion, two hundred twenty-one million, one hundred seven thousand, one hundred sixty-three".