664163 has 4 divisors (see below), whose sum is σ = 675480. Its totient is φ = 652848.

The previous prime is 664151. The next prime is 664177. The reversal of 664163 is 361466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664163 - 2⁶ = 664099 is a prime.

It is a super-2 number, since 2×664163² = 882224981138, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664123) 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, 5570 + ... + 5687.

It is an arithmetic number, because the mean of its divisors is an integer number (168870).

2⁶⁶⁴¹⁶³ is an apocalyptic number.

664163 is a deficient number, since it is larger than the sum of its proper divisors (11317).

664163 is a wasteful number, since it uses less digits than its factorization.

664163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11316.

The product of its digits is 2592, while the sum is 26.

The square root of 664163 is about 814.9619623025. The cubic root of 664163 is about 87.2485515751.

The spelling of 664163 in words is "six hundred sixty-four thousand, one hundred sixty-three".