166818444 has 24 divisors (see below), whose sum is σ = 419185200. Its totient is φ = 51328704.

The previous prime is 166818439. The next prime is 166818451. The reversal of 166818444 is 444818661.

166818444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166818444² = 55656786517162272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166818396 and 166818405.

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, 534519 + ... + 534830.

It is an arithmetic number, because the mean of its divisors is an integer number (17466050).

Almost surely, 2^166818444 is an apocalyptic number.

It is an amenable number.

166818444 is an abundant number, since it is smaller than the sum of its proper divisors (252366756).

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

166818444 is a wasteful number, since it uses less digits than its factorization.

166818444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069369 (or 1069367 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 166818444 is about 12915.8214605189. The cubic root of 166818444 is about 550.4882100361.

The spelling of 166818444 in words is "one hundred sixty-six million, eight hundred eighteen thousand, four hundred forty-four".