166726586624 has 144 divisors (see below), whose sum is σ = 380482628400. Its totient is φ = 72233779200.

The previous prime is 166726586623. The next prime is 166726586627. The reversal of 166726586624 is 426685627661.

It can be written as a sum of positive squares in 8 ways, for example, as 24326017024 + 142400569600 = 155968^2 + 377360^2 .

It is not an unprimeable number, because it can be changed into a prime (166726586623) 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, 22683302 + ... + 22690650.

It is an arithmetic number, because the mean of its divisors is an integer number (2642240475).

Almost surely, 2^166726586624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166726586624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190241314200).

166726586624 is an abundant number, since it is smaller than the sum of its proper divisors (213756041776).

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

166726586624 is a wasteful number, since it uses less digits than its factorization.

166726586624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7796 (or 7782 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 59.

The spelling of 166726586624 in words is "one hundred sixty-six billion, seven hundred twenty-six million, five hundred eighty-six thousand, six hundred twenty-four".