166385 has 8 divisors (see below), whose sum is σ = 202176. Its totient is φ = 131440.

The previous prime is 166363. The next prime is 166393. The reversal of 166385 is 583661.

166385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166385 - 2¹² = 162289 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166385.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380 + ... + 690.

It is an arithmetic number, because the mean of its divisors is an integer number (25272).

2¹⁶⁶³⁸⁵ is an apocalyptic number.

It is an amenable number.

166385 is a deficient number, since it is larger than the sum of its proper divisors (35791).

166385 is a wasteful number, since it uses less digits than its factorization.

166385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423.

The product of its digits is 4320, while the sum is 29.

The square root of 166385 is about 407.9031747854. The cubic root of 166385 is about 55.0011019063.

The spelling of 166385 in words is "one hundred sixty-six thousand, three hundred eighty-five".