166825 has 6 divisors (see below), whose sum is σ = 206894. Its totient is φ = 133440.

The previous prime is 166823. The next prime is 166841. The reversal of 166825 is 528661.

166825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 361 + 166464 = 19^2 + 408^2 .

It is not a de Polignac number, because 166825 - 2¹ = 166823 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 166793 and 166802.

It is not an unprimeable number, because it can be changed into a prime (166823) 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, 3312 + ... + 3361.

2¹⁶⁶⁸²⁵ is an apocalyptic number.

It is an amenable number.

166825 is a deficient number, since it is larger than the sum of its proper divisors (40069).

166825 is an equidigital number, since it uses as much as digits as its factorization.

166825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6683 (or 6678 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 166825 is about 408.4421623682. The cubic root of 166825 is about 55.0495421376.

The spelling of 166825 in words is "one hundred sixty-six thousand, eight hundred twenty-five".