166686445722 has 32 divisors (see below), whose sum is σ = 336447950400. Its totient is φ = 55051500800.

The previous prime is 166686445699. The next prime is 166686445729. The reversal of 166686445722 is 227544686661.

It is not an unprimeable number, because it can be changed into a prime (166686445729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126013 + ... + 590975.

It is an arithmetic number, because the mean of its divisors is an integer number (10513998450).

Almost surely, 2^166686445722 is an apocalyptic number.

166686445722 is an abundant number, since it is smaller than the sum of its proper divisors (169761504678).

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

166686445722 is a wasteful number, since it uses less digits than its factorization.

166686445722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465518.

The product of its digits is 23224320, while the sum is 57.

The spelling of 166686445722 in words is "one hundred sixty-six billion, six hundred eighty-six million, four hundred forty-five thousand, seven hundred twenty-two".