163686 has 8 divisors (see below), whose sum is σ = 327384. Its totient is φ = 54560.

The previous prime is 163679. The next prime is 163697. The reversal of 163686 is 686361.

It is a sphenic number, since it is the product of 3 distinct primes.

163686 is an admirable number.

It is a congruent number.

It is an unprimeable number.

163686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13635 + ... + 13646.

It is an arithmetic number, because the mean of its divisors is an integer number (40923).

2¹⁶³⁶⁸⁶ is an apocalyptic number.

163686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

163686 is a wasteful number, since it uses less digits than its factorization.

163686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27286.

The product of its digits is 5184, while the sum is 30.

The square root of 163686 is about 404.5812650136. The cubic root of 163686 is about 54.7020806292.

The spelling of 163686 in words is "one hundred sixty-three thousand, six hundred eighty-six".