166440120 has 128 divisors (see below), whose sum is σ = 622563840. Its totient is φ = 34583040.

The previous prime is 166440101. The next prime is 166440151. The reversal of 166440120 is 21044661.

It is a super-2 number, since 2×166440120² = 55404627091228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 234 + ... + 18246.

It is an arithmetic number, because the mean of its divisors is an integer number (4863780).

Almost surely, 2^166440120 is an apocalyptic number.

166440120 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 166440120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311281920).

166440120 is an abundant number, since it is smaller than the sum of its proper divisors (456123720).

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

166440120 is a wasteful number, since it uses less digits than its factorization.

166440120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18045 (or 18041 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 166440120 is about 12901.1673890389. The cubic root of 166440120 is about 550.0717482157.

Adding to 166440120 its reverse (21044661), we get a palindrome (187484781).

The spelling of 166440120 in words is "one hundred sixty-six million, four hundred forty thousand, one hundred twenty".