166315618722 has 64 divisors (see below), whose sum is σ = 364911206400. Its totient is φ = 50115542400.

The previous prime is 166315618687. The next prime is 166315618771. The reversal of 166315618722 is 227816513661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33108303 + ... + 33113325.

It is an arithmetic number, because the mean of its divisors is an integer number (5701737600).

Almost surely, 2^166315618722 is an apocalyptic number.

166315618722 is an abundant number, since it is smaller than the sum of its proper divisors (198595587678).

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

166315618722 is a wasteful number, since it uses less digits than its factorization.

166315618722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7759.

The product of its digits is 725760, while the sum is 48.

The spelling of 166315618722 in words is "one hundred sixty-six billion, three hundred fifteen million, six hundred eighteen thousand, seven hundred twenty-two".