665233313 has 4 divisors (see below), whose sum is σ = 665481408. Its totient is φ = 664985220.

The previous prime is 665233277. The next prime is 665233357. The reversal of 665233313 is 313332566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 665233313 - 2⁸ = 665233057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665233313.

It is not an unprimeable number, because it can be changed into a prime (665233913) 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, 119981 + ... + 125402.

It is an arithmetic number, because the mean of its divisors is an integer number (166370352).

Almost surely, 2^665233313 is an apocalyptic number.

It is an amenable number.

665233313 is a deficient number, since it is larger than the sum of its proper divisors (248095).

665233313 is a wasteful number, since it uses less digits than its factorization.

665233313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248094.

The product of its digits is 29160, while the sum is 32.

The square root of 665233313 is about 25792.1172647768. The cubic root of 665233313 is about 872.9539406251.

Adding to 665233313 its reverse (313332566), we get a palindrome (978565879).

The spelling of 665233313 in words is "six hundred sixty-five million, two hundred thirty-three thousand, three hundred thirteen".