665132313 has 16 divisors (see below), whose sum is σ = 942223680. Its totient is φ = 416558016.

The previous prime is 665132309. The next prime is 665132341. The reversal of 665132313 is 313231566.

It is a happy number.

665132313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665132313 - 2² = 665132309 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (665132393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100095 + ... + 106532.

It is an arithmetic number, because the mean of its divisors is an integer number (58888980).

Almost surely, 2^665132313 is an apocalyptic number.

It is an amenable number.

665132313 is a deficient number, since it is larger than the sum of its proper divisors (277091367).

665132313 is a wasteful number, since it uses less digits than its factorization.

665132313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206696.

The product of its digits is 9720, while the sum is 30.

The square root of 665132313 is about 25790.1592278916. The cubic root of 665132313 is about 872.9097592285.

Adding to 665132313 its reverse (313231566), we get a palindrome (978363879).

The spelling of 665132313 in words is "six hundred sixty-five million, one hundred thirty-two thousand, three hundred thirteen".