665465313 has 16 divisors (see below), whose sum is σ = 940668416. Its totient is φ = 417726720.

The previous prime is 665465261. The next prime is 665465389. The reversal of 665465313 is 313564566.

It is a happy number.

665465313 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 665465313 - 2¹² = 665461217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665465413) 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, 93256 + ... + 100137.

It is an arithmetic number, because the mean of its divisors is an integer number (58791776).

Almost surely, 2^665465313 is an apocalyptic number.

It is an amenable number.

665465313 is a deficient number, since it is larger than the sum of its proper divisors (275203103).

665465313 is a wasteful number, since it uses less digits than its factorization.

665465313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193464.

The product of its digits is 194400, while the sum is 39.

The square root of 665465313 is about 25796.6143708821. The cubic root of 665465313 is about 873.0554096743.

The spelling of 665465313 in words is "six hundred sixty-five million, four hundred sixty-five thousand, three hundred thirteen".