166668500 has 24 divisors (see below), whose sum is σ = 364005096. Its totient is φ = 66667200.

The previous prime is 166668497. The next prime is 166668553. The reversal of 166668500 is 5866661.

It can be written as a sum of positive squares in 4 ways, for example, as 13205956 + 153462544 = 3634^2 + 12388^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166169 + ... + 167168.

It is an arithmetic number, because the mean of its divisors is an integer number (15166879).

Almost surely, 2^166668500 is an apocalyptic number.

166668500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166668500 is an abundant number, since it is smaller than the sum of its proper divisors (197336596).

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

166668500 is a wasteful number, since it uses less digits than its factorization.

166668500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333356 (or 333344 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 166668500 is about 12910.0154918575. The cubic root of 166668500 is about 550.3232259861.

The spelling of 166668500 in words is "one hundred sixty-six million, six hundred sixty-eight thousand, five hundred".