166044440 has 64 divisors (see below), whose sum is σ = 402161760. Its totient is φ = 61470720.

The previous prime is 166044433. The next prime is 166044443. The reversal of 166044440 is 44440661.

166044440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166044443) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 39479 + ... + 43481.

Almost surely, 2^166044440 is an apocalyptic number.

166044440 is a gapful number since it is divisible by the number (10) 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 166044440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201080880).

166044440 is an abundant number, since it is smaller than the sum of its proper divisors (236117320).

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

166044440 is a wasteful number, since it uses less digits than its factorization.

166044440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092 (or 4088 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 166044440 is about 12885.8232177847. The cubic root of 166044440 is about 549.6355050524.

The spelling of 166044440 in words is "one hundred sixty-six million, forty-four thousand, four hundred forty".