166860285120 has 392 divisors, whose sum is σ = 597498068400. Its totient is φ = 44364257280.

The previous prime is 166860285107. The next prime is 166860285127. The reversal of 166860285120 is 21582068661.

166860285120 is a `hidden beast` number, since 16 + 6 + 8 + 602 + 8 + 5 + 1 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (166860285127) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 98210031 + ... + 98211729.

Almost surely, 2^166860285120 is an apocalyptic number.

166860285120 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 166860285120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298749034200).

166860285120 is an abundant number, since it is smaller than the sum of its proper divisors (430637783280).

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

166860285120 is an equidigital number, since it uses as much as digits as its factorization.

166860285120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155 (or 2130 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 166860285120 in words is "one hundred sixty-six billion, eight hundred sixty million, two hundred eighty-five thousand, one hundred twenty".