166185544 has 64 divisors (see below), whose sum is σ = 380390400. Its totient is φ = 66528000.

The previous prime is 166185431. The next prime is 166185559. The reversal of 166185544 is 445581661.

166185544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 166185497 and 166185506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48694 + ... + 51994.

It is an arithmetic number, because the mean of its divisors is an integer number (5943600).

Almost surely, 2^166185544 is an apocalyptic number.

166185544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166185544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190195200).

166185544 is an abundant number, since it is smaller than the sum of its proper divisors (214204856).

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

166185544 is a wasteful number, since it uses less digits than its factorization.

166185544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374 (or 3370 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 166185544 is about 12891.2972194423. The cubic root of 166185544 is about 549.7911537647.

The spelling of 166185544 in words is "one hundred sixty-six million, one hundred eighty-five thousand, five hundred forty-four".