166671 has 8 divisors (see below), whose sum is σ = 246960. Its totient is φ = 111096.

The previous prime is 166669. The next prime is 166679. The reversal of 166671 is 176661.

166671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166671 - 2¹ = 166669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 6173 = 166671 / (1 + 6 + 6 + 6 + 7 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166679) 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, 3060 + ... + 3113.

It is an arithmetic number, because the mean of its divisors is an integer number (30870).

2¹⁶⁶⁶⁷¹ is an apocalyptic number.

166671 is a deficient number, since it is larger than the sum of its proper divisors (80289).

166671 is an equidigital number, since it uses as much as digits as its factorization.

166671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6182 (or 6176 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 166671 is about 408.2535976571. The cubic root of 166671 is about 55.0325977558.

The spelling of 166671 in words is "one hundred sixty-six thousand, six hundred seventy-one".