166872424 has 16 divisors (see below), whose sum is σ = 313135200. Its totient is φ = 83369712.

The previous prime is 166872389. The next prime is 166872449. The reversal of 166872424 is 424278661.

It is a happy number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3307 + ... + 18565.

It is an arithmetic number, because the mean of its divisors is an integer number (19570950).

Almost surely, 2^166872424 is an apocalyptic number.

It is an amenable number.

166872424 is a deficient number, since it is larger than the sum of its proper divisors (146262776).

166872424 is a wasteful number, since it uses less digits than its factorization.

166872424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16632 (or 16628 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 166872424 is about 12917.9109766247. The cubic root of 166872424 is about 550.5475802677.

The spelling of 166872424 in words is "one hundred sixty-six million, eight hundred seventy-two thousand, four hundred twenty-four".