665304 has 32 divisors (see below), whose sum is σ = 1752000. Its totient is φ = 209952.

The previous prime is 665303. The next prime is 665311. The reversal of 665304 is 403566.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665303) 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, 274 + ... + 1185.

It is an arithmetic number, because the mean of its divisors is an integer number (54750).

2⁶⁶⁵³⁰⁴ is an apocalyptic number.

It is an amenable number.

665304 is an abundant number, since it is smaller than the sum of its proper divisors (1086696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665304 is a wasteful number, since it uses less digits than its factorization.

665304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 665304 is about 815.6616945769. The cubic root of 665304 is about 87.2984859256.

It can be divided in two parts, 665 and 304, that added together give a palindrome (969).

The spelling of 665304 in words is "six hundred sixty-five thousand, three hundred four".