664311 has 8 divisors (see below), whose sum is σ = 897280. Its totient is φ = 437112.

The previous prime is 664289. The next prime is 664319. The reversal of 664311 is 113466.

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

It is not a de Polignac number, because 664311 - 2¹³ = 656119 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165 + ... + 1638.

It is an arithmetic number, because the mean of its divisors is an integer number (112160).

2⁶⁶⁴³¹¹ is an apocalyptic number.

664311 is a deficient number, since it is larger than the sum of its proper divisors (232969).

664311 is a wasteful number, since it uses less digits than its factorization.

664311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885.

The product of its digits is 432, while the sum is 21.

The square root of 664311 is about 815.0527590285. The cubic root of 664311 is about 87.2550318250.

Adding to 664311 its reverse (113466), we get a palindrome (777777).

The spelling of 664311 in words is "six hundred sixty-four thousand, three hundred eleven".