166680 has 48 divisors (see below), whose sum is σ = 542880. Its totient is φ = 44352.

The previous prime is 166679. The next prime is 166693. The reversal of 166680 is 86661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129 + ... + 591.

It is an arithmetic number, because the mean of its divisors is an integer number (11310).

2¹⁶⁶⁶⁸⁰ is an apocalyptic number.

166680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271440).

166680 is an abundant number, since it is smaller than the sum of its proper divisors (376200).

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

166680 is a wasteful number, since it uses less digits than its factorization.

166680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 166680 is about 408.2646200689. The cubic root of 166680 is about 55.0335882990.

The spelling of 166680 in words is "one hundred sixty-six thousand, six hundred eighty".