665272 has 16 divisors (see below), whose sum is σ = 1258560. Its totient is φ = 329664.

The previous prime is 665267. The next prime is 665279. The reversal of 665272 is 272566.

665272 is nontrivially palindromic in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 665272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665279) by changing a digit.

665272 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (78660).

2⁶⁶⁵²⁷² is an apocalyptic number.

It is an amenable number.

665272 is a deficient number, since it is larger than the sum of its proper divisors (593288).

665272 is a wasteful number, since it uses less digits than its factorization.

665272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750 (or 746 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 665272 is about 815.6420783653. The cubic root of 665272 is about 87.2970862665.

It can be divided in two parts, 6652 and 72, that added together give a square (6724 = 82²).

The spelling of 665272 in words is "six hundred sixty-five thousand, two hundred seventy-two".