166726674 has 56 divisors (see below), whose sum is σ = 377701452. Its totient is φ = 55170720.

The previous prime is 166726663. The next prime is 166726687. The reversal of 166726674 is 476627661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 141776649 + 24950025 = 11907^2 + 4995^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 251904 + ... + 252564.

Almost surely, 2^166726674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166726674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188850726).

166726674 is an abundant number, since it is smaller than the sum of its proper divisors (210974778).

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

166726674 is an equidigital number, since it uses as much as digits as its factorization.

166726674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 839 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 166726674 is about 12912.2683522300. The cubic root of 166726674 is about 550.3872468405.

The spelling of 166726674 in words is "one hundred sixty-six million, seven hundred twenty-six thousand, six hundred seventy-four".