166115600660 has 48 divisors (see below), whose sum is σ = 364059360000. Its totient is φ = 63548626944.

The previous prime is 166115600639. The next prime is 166115600719. The reversal of 166115600660 is 66006511661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4119476 + ... + 4159604.

It is an arithmetic number, because the mean of its divisors is an integer number (7584570000).

Almost surely, 2^166115600660 is an apocalyptic number.

166115600660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166115600660 is an abundant number, since it is smaller than the sum of its proper divisors (197943759340).

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

166115600660 is a wasteful number, since it uses less digits than its factorization.

166115600660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49160 (or 49158 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 166115600660 in words is "one hundred sixty-six billion, one hundred fifteen million, six hundred thousand, six hundred sixty".