166887 has 16 divisors (see below), whose sum is σ = 282880. Its totient is φ = 95256.

The previous prime is 166871. The next prime is 166909. The reversal of 166887 is 788661.

It is not a de Polignac number, because 166887 - 2⁴ = 166871 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166887.

It is not an unprimeable number, because it can be changed into a prime (166807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253 + ... + 630.

It is an arithmetic number, because the mean of its divisors is an integer number (17680).

2¹⁶⁶⁸⁸⁷ is an apocalyptic number.

166887 is a deficient number, since it is larger than the sum of its proper divisors (115993).

166887 is an equidigital number, since it uses as much as digits as its factorization.

166887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 893 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 166887 is about 408.5180534566. The cubic root of 166887 is about 55.0563609575.

It can be divided in two parts, 16 and 6887, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 166887 in words is "one hundred sixty-six thousand, eight hundred eighty-seven".