166718885222 has 4 divisors (see below), whose sum is σ = 250078327836. Its totient is φ = 83359442610.

The previous prime is 166718885197. The next prime is 166718885227. The reversal of 166718885222 is 222588817661.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166718885227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41679721304 + ... + 41679721307.

It is an arithmetic number, because the mean of its divisors is an integer number (62519581959).

Almost surely, 2^166718885222 is an apocalyptic number.

166718885222 is a deficient number, since it is larger than the sum of its proper divisors (83359442614).

166718885222 is an equidigital number, since it uses as much as digits as its factorization.

166718885222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83359442613.

The product of its digits is 5160960, while the sum is 56.

The spelling of 166718885222 in words is "one hundred sixty-six billion, seven hundred eighteen million, eight hundred eighty-five thousand, two hundred twenty-two".