166676720 has 80 divisors (see below), whose sum is σ = 444638208. Its totient is φ = 56920320.

The previous prime is 166676701. The next prime is 166676753. The reversal of 166676720 is 27676661.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×166676720² = 55562257979916800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205115 + ... + 205925.

Almost surely, 2^166676720 is an apocalyptic number.

166676720 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 166676720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222319104).

166676720 is an abundant number, since it is smaller than the sum of its proper divisors (277961488).

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

166676720 is a wasteful number, since it uses less digits than its factorization.

166676720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 166676720 is about 12910.3338454124. Note that the first 3 decimals coincide. The cubic root of 166676720 is about 550.3322730517.

The spelling of 166676720 in words is "one hundred sixty-six million, six hundred seventy-six thousand, seven hundred twenty".