166920 has 64 divisors (see below), whose sum is σ = 544320. Its totient is φ = 40704.

The previous prime is 166919. The next prime is 166931. The reversal of 166920 is 29661.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1507 + ... + 1613.

It is an arithmetic number, because the mean of its divisors is an integer number (8505).

2¹⁶⁶⁹²⁰ is an apocalyptic number.

166920 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 166920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272160).

166920 is an abundant number, since it is smaller than the sum of its proper divisors (377400).

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

166920 is a wasteful number, since it uses less digits than its factorization.

166920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 166920 is about 408.5584413520. The cubic root of 166920 is about 55.0599896407.

The spelling of 166920 in words is "one hundred sixty-six thousand, nine hundred twenty".