166485 has 16 divisors (see below), whose sum is σ = 290880. Its totient is φ = 80640.

The previous prime is 166471. The next prime is 166487. The reversal of 166485 is 584661.

166485 = T₁₀ + T₁₁ + ... + T₉₉.

It is not a de Polignac number, because 166485 - 2⁷ = 166357 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340 + ... + 669.

It is an arithmetic number, because the mean of its divisors is an integer number (18180).

2¹⁶⁶⁴⁸⁵ is an apocalyptic number.

166485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166485 is a deficient number, since it is larger than the sum of its proper divisors (124395).

166485 is a wasteful number, since it uses less digits than its factorization.

166485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its digits is 5760, while the sum is 30.

The square root of 166485 is about 408.0257344825. The cubic root of 166485 is about 55.0121185418.

It can be divided in two parts, 16648 and 5, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 166485 in words is "one hundred sixty-six thousand, four hundred eighty-five".