166975 has 6 divisors (see below), whose sum is σ = 207080. Its totient is φ = 133560.

The previous prime is 166973. The next prime is 166979. The reversal of 166975 is 579661.

It is not a de Polignac number, because 166975 - 2¹ = 166973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3315 + ... + 3364.

2¹⁶⁶⁹⁷⁵ is an apocalyptic number.

166975 is a deficient number, since it is larger than the sum of its proper divisors (40105).

166975 is an equidigital number, since it uses as much as digits as its factorization.

166975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6689 (or 6684 counting only the distinct ones).

The product of its digits is 11340, while the sum is 34.

The square root of 166975 is about 408.6257456402. The cubic root of 166975 is about 55.0660363834.

Subtracting 166975 from its reverse (579661), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 166975 in words is "one hundred sixty-six thousand, nine hundred seventy-five".