163686660 has 48 divisors (see below), whose sum is σ = 462877632. Its totient is φ = 43216000.

The previous prime is 163686647. The next prime is 163686697. The reversal of 163686660 is 66686361.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7446 + ... + 19565.

It is an arithmetic number, because the mean of its divisors is an integer number (9643284).

Almost surely, 2^163686660 is an apocalyptic number.

163686660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163686660 is an abundant number, since it is smaller than the sum of its proper divisors (299190972).

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

163686660 is a wasteful number, since it uses less digits than its factorization.

163686660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27124 (or 27122 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 163686660 is about 12794.0087541005. The cubic root of 163686660 is about 547.0215415072.

The spelling of 163686660 in words is "one hundred sixty-three million, six hundred eighty-six thousand, six hundred sixty".