166687 has 8 divisors (see below), whose sum is σ = 181760. Its totient is φ = 152280.

The previous prime is 166679. The next prime is 166693. The reversal of 166687 is 786661.

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

It is a cyclic number.

It is not a de Polignac number, because 166687 - 2³ = 166679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448 + ... + 730.

It is an arithmetic number, because the mean of its divisors is an integer number (22720).

2¹⁶⁶⁶⁸⁷ is an apocalyptic number.

166687 is a deficient number, since it is larger than the sum of its proper divisors (15073).

166687 is a wasteful number, since it uses less digits than its factorization.

166687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333.

The product of its digits is 12096, while the sum is 34.

The square root of 166687 is about 408.2731928501. The cubic root of 166687 is about 55.0343586968.

The spelling of 166687 in words is "one hundred sixty-six thousand, six hundred eighty-seven".