166155660 has 144 divisors (see below), whose sum is σ = 567770112. Its totient is φ = 38966400.

The previous prime is 166155659. The next prime is 166155667. The reversal of 166155660 is 66551661.

166155660 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (166155667) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60027 + ... + 62733.

It is an arithmetic number, because the mean of its divisors is an integer number (3942848).

Almost surely, 2^166155660 is an apocalyptic number.

166155660 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 166155660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283885056).

166155660 is an abundant number, since it is smaller than the sum of its proper divisors (401614452).

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

166155660 is a wasteful number, since it uses less digits than its factorization.

166155660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764 (or 2759 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 166155660 is about 12890.1380908041. The cubic root of 166155660 is about 549.7581967389.

The spelling of 166155660 in words is "one hundred sixty-six million, one hundred fifty-five thousand, six hundred sixty".