668163 has 8 divisors (see below), whose sum is σ = 895168. Its totient is φ = 443304.

The previous prime is 668159. The next prime is 668179. The reversal of 668163 is 361866.

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

It is not a de Polignac number, because 668163 - 2² = 668159 is a prime.

It is an Ulam number.

It is a Duffinian number.

668163 is a lucky number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 668163.

It is not an unprimeable number, because it can be changed into a prime (668153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456 + ... + 1242.

It is an arithmetic number, because the mean of its divisors is an integer number (111896).

2⁶⁶⁸¹⁶³ is an apocalyptic number.

668163 is a deficient number, since it is larger than the sum of its proper divisors (227005).

668163 is a wasteful number, since it uses less digits than its factorization.

668163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073.

The product of its digits is 5184, while the sum is 30.

The square root of 668163 is about 817.4123806256. The cubic root of 668163 is about 87.4233560140.

It can be divided in two parts, 6681 and 63, that multiplied together give a triangular number (420903 = T₉₁₇).

The spelling of 668163 in words is "six hundred sixty-eight thousand, one hundred sixty-three".