166872444 has 12 divisors (see below), whose sum is σ = 389369064. Its totient is φ = 55624144.

The previous prime is 166872389. The next prime is 166872449. The reversal of 166872444 is 444278661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 166872396 and 166872405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166872449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6953007 + ... + 6953030.

It is an arithmetic number, because the mean of its divisors is an integer number (32447422).

Almost surely, 2^166872444 is an apocalyptic number.

It is an amenable number.

166872444 is an abundant number, since it is smaller than the sum of its proper divisors (222496620).

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

166872444 is a wasteful number, since it uses less digits than its factorization.

166872444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13906044 (or 13906042 counting only the distinct ones).

The product of its digits is 258048, while the sum is 42.

The square root of 166872444 is about 12917.9117507436. The cubic root of 166872444 is about 550.5476022625.

The spelling of 166872444 in words is "one hundred sixty-six million, eight hundred seventy-two thousand, four hundred forty-four".