168664 has 16 divisors (see below), whose sum is σ = 327600. Its totient is φ = 81312.

The previous prime is 168643. The next prime is 168673. The reversal of 168664 is 466861.

168664 is an esthetic number in base 14, because in such base its adjacent digits differ by 1.

It is a congruent number.

It is an unprimeable number.

168664 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, 132 + ... + 595.

It is an arithmetic number, because the mean of its divisors is an integer number (20475).

2¹⁶⁸⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

168664 is a deficient number, since it is larger than the sum of its proper divisors (158936).

168664 is a wasteful number, since it uses less digits than its factorization.

168664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 758 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 168664 is about 410.6872289224. The cubic root of 168664 is about 55.2510834264.

The spelling of 168664 in words is "one hundred sixty-eight thousand, six hundred sixty-four".