166944820 has 48 divisors (see below), whose sum is σ = 401401728. Its totient is φ = 57133440.

The previous prime is 166944803. The next prime is 166944821. The reversal of 166944820 is 28449661.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166944821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152194 + ... + 153286.

It is an arithmetic number, because the mean of its divisors is an integer number (8362536).

Almost surely, 2^166944820 is an apocalyptic number.

166944820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166944820 is an abundant number, since it is smaller than the sum of its proper divisors (234456908).

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

166944820 is a wasteful number, since it uses less digits than its factorization.

166944820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200 (or 2198 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 166944820 is about 12920.7128286329. The cubic root of 166944820 is about 550.6271853519.

The spelling of 166944820 in words is "one hundred sixty-six million, nine hundred forty-four thousand, eight hundred twenty".