665163 has 6 divisors (see below), whose sum is σ = 960804. Its totient is φ = 443436.

The previous prime is 665153. The next prime is 665177. The reversal of 665163 is 361566.

665163 is a `hidden beast` number, since 6 + 651 + 6 + 3 = 666.

It is not a de Polignac number, because 665163 - 2⁵ = 665131 is a prime.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665163.

It is not an unprimeable number, because it can be changed into a prime (665113) 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, 36945 + ... + 36962.

It is an arithmetic number, because the mean of its divisors is an integer number (160134).

2⁶⁶⁵¹⁶³ is an apocalyptic number.

665163 is a deficient number, since it is larger than the sum of its proper divisors (295641).

665163 is a wasteful number, since it uses less digits than its factorization.

665163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73913 (or 73910 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 665163 is about 815.5752571038. The cubic root of 665163 is about 87.2923183410.

It can be divided in two parts, 665 and 163, that added together give a palindrome (828).

The spelling of 665163 in words is "six hundred sixty-five thousand, one hundred sixty-three".