166580 has 12 divisors (see below), whose sum is σ = 349860. Its totient is φ = 66624.

The previous prime is 166571. The next prime is 166597. The reversal of 166580 is 85661.

It can be written as a sum of positive squares in 2 ways, for example, as 38416 + 128164 = 196^2 + 358^2 .

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166580.

It is an unprimeable number.

166580 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4145 + ... + 4184.

It is an arithmetic number, because the mean of its divisors is an integer number (29155).

2¹⁶⁶⁵⁸⁰ is an apocalyptic number.

166580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166580 is an abundant number, since it is smaller than the sum of its proper divisors (183280).

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

166580 is a wasteful number, since it uses less digits than its factorization.

166580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8338 (or 8336 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 166580 is about 408.1421321060. The cubic root of 166580 is about 55.0225802601.

The spelling of 166580 in words is "one hundred sixty-six thousand, five hundred eighty".