165166 has 8 divisors (see below), whose sum is σ = 249480. Its totient is φ = 82008.

The previous prime is 165161. The next prime is 165173. The reversal of 165166 is 661561.

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

It is a self number, because there is not a number n which added to its sum of digits gives 165166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385 + ... + 691.

It is an arithmetic number, because the mean of its divisors is an integer number (31185).

2¹⁶⁵¹⁶⁶ is an apocalyptic number.

165166 is a deficient number, since it is larger than the sum of its proper divisors (84314).

165166 is a wasteful number, since it uses less digits than its factorization.

165166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578.

The product of its digits is 1080, while the sum is 25.

The square root of 165166 is about 406.4062007401. The cubic root of 165166 is about 54.8664528521.

The spelling of 165166 in words is "one hundred sixty-five thousand, one hundred sixty-six".