22918122666 has 56 divisors (see below), whose sum is σ = 51666009444. Its totient is φ = 7621024320.

The previous prime is 22918122659. The next prime is 22918122707. The reversal of 22918122666 is 66622181922.

It can be written as a sum of positive squares in 2 ways, for example, as 21218292225 + 1699830441 = 145665^2 + 41229^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 595150 + ... + 632486.

Almost surely, 2^22918122666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22918122666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25833004722).

22918122666 is an abundant number, since it is smaller than the sum of its proper divisors (28747886778).

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

22918122666 is an equidigital number, since it uses as much as digits as its factorization.

22918122666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37778 (or 37763 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 22918122666 in words is "twenty-two billion, nine hundred eighteen million, one hundred twenty-two thousand, six hundred sixty-six".