665472 has 32 divisors (see below), whose sum is σ = 1768680. Its totient is φ = 221696.

The previous prime is 665447. The next prime is 665479. The reversal of 665472 is 274566.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665472.

It is not an unprimeable number, because it can be changed into a prime (665479) by changing a digit.

665472 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483 + ... + 1250.

2⁶⁶⁵⁴⁷² is an apocalyptic number.

It is an amenable number.

665472 is an abundant number, since it is smaller than the sum of its proper divisors (1103208).

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

665472 is a wasteful number, since it uses less digits than its factorization.

665472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750 (or 1738 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 665472 is about 815.7646719490. The cubic root of 665472 is about 87.3058333995.

The spelling of 665472 in words is "six hundred sixty-five thousand, four hundred seventy-two".