61166722222 has 12 divisors (see below), whose sum is σ = 95022978336. Its totient is φ = 29528761640.

The previous prime is 61166722213. The next prime is 61166722237. The reversal of 61166722222 is 22222766116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18181054 + ... + 18184417.

It is an arithmetic number, because the mean of its divisors is an integer number (7918581528).

Almost surely, 2^61166722222 is an apocalyptic number.

61166722222 is a deficient number, since it is larger than the sum of its proper divisors (33856256114).

61166722222 is a wasteful number, since it uses less digits than its factorization.

61166722222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36365531 (or 36365502 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The spelling of 61166722222 in words is "sixty-one billion, one hundred sixty-six million, seven hundred twenty-two thousand, two hundred twenty-two".