220905977166 has 40 divisors (see below), whose sum is σ = 565706314800. Its totient is φ = 63115993152.

The previous prime is 220905977147. The next prime is 220905977191. The reversal of 220905977166 is 661779509022.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 97400091 + ... + 97402358.

It is an arithmetic number, because the mean of its divisors is an integer number (14142657870).

Almost surely, 2^220905977166 is an apocalyptic number.

220905977166 is an abundant number, since it is smaller than the sum of its proper divisors (344800337634).

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

220905977166 is a wasteful number, since it uses less digits than its factorization.

220905977166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194802470 (or 194802461 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 220905977166 in words is "two hundred twenty billion, nine hundred five million, nine hundred seventy-seven thousand, one hundred sixty-six".