665484 has 12 divisors (see below), whose sum is σ = 1552824. Its totient is φ = 221824.

The previous prime is 665479. The next prime is 665501. The reversal of 665484 is 484566.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

665484 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, 27717 + ... + 27740.

It is an arithmetic number, because the mean of its divisors is an integer number (129402).

2⁶⁶⁵⁴⁸⁴ is an apocalyptic number.

It is an amenable number.

665484 is an abundant number, since it is smaller than the sum of its proper divisors (887340).

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

665484 is a wasteful number, since it uses less digits than its factorization.

665484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55464 (or 55462 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 665484 is about 815.7720269781. The cubic root of 665484 is about 87.3063581717.

The spelling of 665484 in words is "six hundred sixty-five thousand, four hundred eighty-four".