166886 has 4 divisors (see below), whose sum is σ = 250332. Its totient is φ = 83442.

The previous prime is 166871. The next prime is 166909. The reversal of 166886 is 688661.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41720 + ... + 41723.

It is an arithmetic number, because the mean of its divisors is an integer number (62583).

2¹⁶⁶⁸⁸⁶ is an apocalyptic number.

166886 is a deficient number, since it is larger than the sum of its proper divisors (83446).

166886 is an equidigital number, since it uses as much as digits as its factorization.

166886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83445.

The product of its digits is 13824, while the sum is 35.

The square root of 166886 is about 408.5168295187. The cubic root of 166886 is about 55.0562509899.

It can be divided in two parts, 16688 and 6, that multiplied together give a triangular number (100128 = T₄₄₇).

The spelling of 166886 in words is "one hundred sixty-six thousand, eight hundred eighty-six".