664548 has 24 divisors (see below), whose sum is σ = 1572480. Its totient is φ = 218400.

The previous prime is 664537. The next prime is 664549. The reversal of 664548 is 845466.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (664549) by changing a digit.

664548 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 7 ways as a sum of consecutive naturals, for example, 598 + ... + 1298.

It is an arithmetic number, because the mean of its divisors is an integer number (65520).

2⁶⁶⁴⁵⁴⁸ is an apocalyptic number.

It is an amenable number.

664548 is an abundant number, since it is smaller than the sum of its proper divisors (907932).

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

664548 is a wasteful number, since it uses less digits than its factorization.

664548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 785 counting only the distinct ones).

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

The square root of 664548 is about 815.1981354248. The cubic root of 664548 is about 87.2654069775.

The spelling of 664548 in words is "six hundred sixty-four thousand, five hundred forty-eight".