166785444 has 72 divisors (see below), whose sum is σ = 485442048. Its totient is φ = 47295360.

The previous prime is 166785427. The next prime is 166785449. The reversal of 166785444 is 444587661.

166785444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 166785444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166785449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32109 + ... + 36939.

Almost surely, 2^166785444 is an apocalyptic number.

166785444 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 166785444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242721024).

166785444 is an abundant number, since it is smaller than the sum of its proper divisors (318656604).

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

166785444 is a wasteful number, since it uses less digits than its factorization.

166785444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985 (or 4980 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 166785444 is about 12914.5438943851. The cubic root of 166785444 is about 550.4519084767.

It can be divided in two parts, 16678 and 5444, that added together give a palindrome (22122).

The spelling of 166785444 in words is "one hundred sixty-six million, seven hundred eighty-five thousand, four hundred forty-four".