166684 has 12 divisors (see below), whose sum is σ = 333424. Its totient is φ = 71424.

The previous prime is 166679. The next prime is 166693. The reversal of 166684 is 486661.

166684 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2949 + ... + 3004.

2¹⁶⁶⁶⁸⁴ is an apocalyptic number.

166684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166684 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.

166684 is a wasteful number, since it uses less digits than its factorization.

166684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5964 (or 5962 counting only the distinct ones).

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

The square root of 166684 is about 408.2695188230. The cubic root of 166684 is about 55.0340285290.

The spelling of 166684 in words is "one hundred sixty-six thousand, six hundred eighty-four".