166115660 has 48 divisors (see below), whose sum is σ = 365444352. Its totient is φ = 63307200.

The previous prime is 166115657. The next prime is 166115669. The reversal of 166115660 is 66511661.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (166115669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151715 + ... + 152805.

It is an arithmetic number, because the mean of its divisors is an integer number (7613424).

Almost surely, 2^166115660 is an apocalyptic number.

166115660 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 166115660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182722176).

166115660 is an abundant number, since it is smaller than the sum of its proper divisors (199328692).

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

166115660 is a wasteful number, since it uses less digits than its factorization.

166115660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454 (or 1452 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 166115660 is about 12888.5864236541. The cubic root of 166115660 is about 549.7140772814.

The spelling of 166115660 in words is "one hundred sixty-six million, one hundred fifteen thousand, six hundred sixty".