166626 has 12 divisors (see below), whose sum is σ = 361062. Its totient is φ = 55536.

The previous prime is 166619. The next prime is 166627. The reversal of 166626 is 626661.

It can be written as a sum of positive squares in only one way, i.e., 164025 + 2601 = 405^2 + 51^2 .

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166626.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166626.

It is not an unprimeable number, because it can be changed into a prime (166627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4611 + ... + 4646.

2¹⁶⁶⁶²⁶ is an apocalyptic number.

166626 is an abundant number, since it is smaller than the sum of its proper divisors (194436).

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

166626 is a wasteful number, since it uses less digits than its factorization.

166626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9265 (or 9262 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 166626 is about 408.1984811339. The cubic root of 166626 is about 55.0276445050.

The spelling of 166626 in words is "one hundred sixty-six thousand, six hundred twenty-six".