18222940666 has 32 divisors (see below), whose sum is σ = 31809996288. Its totient is φ = 7668321840.

The previous prime is 18222940643. The next prime is 18222940709. The reversal of 18222940666 is 66604922281.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141301 + ... + 237511.

It is an arithmetic number, because the mean of its divisors is an integer number (994062384).

Almost surely, 2^18222940666 is an apocalyptic number.

18222940666 is a deficient number, since it is larger than the sum of its proper divisors (13587055622).

18222940666 is a wasteful number, since it uses less digits than its factorization.

18222940666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96466.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 18222940666 in words is "eighteen billion, two hundred twenty-two million, nine hundred forty thousand, six hundred sixty-six".