665313 has 8 divisors (see below), whose sum is σ = 967776. Its totient is φ = 403200.

The previous prime is 665311. The next prime is 665351. The reversal of 665313 is 313566.

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

It is not a de Polignac number, because 665313 - 2¹ = 665311 is a prime.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (665311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10048 + ... + 10113.

It is an arithmetic number, because the mean of its divisors is an integer number (120972).

2⁶⁶⁵³¹³ is an apocalyptic number.

It is an amenable number.

665313 is a deficient number, since it is larger than the sum of its proper divisors (302463).

665313 is a wasteful number, since it uses less digits than its factorization.

665313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20175.

The product of its digits is 1620, while the sum is 24.

The square root of 665313 is about 815.6672115514. The cubic root of 665313 is about 87.2988795716.

Adding to 665313 its reverse (313566), we get a palindrome (978879).

It can be divided in two parts, 6653 and 13, that added together give a palindrome (6666).

The spelling of 665313 in words is "six hundred sixty-five thousand, three hundred thirteen".