664360 has 32 divisors (see below), whose sum is σ = 1584360. Its totient is φ = 249856.

The previous prime is 664357. The next prime is 664369. The reversal of 664360 is 63466.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 662596 + 1764 = 814^2 + 42^2 .

It is not an unprimeable number, because it can be changed into a prime (664369) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 192 + ... + 1168.

2⁶⁶⁴³⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792180).

664360 is an abundant number, since it is smaller than the sum of its proper divisors (920000).

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

664360 is a wasteful number, since it uses less digits than its factorization.

664360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 664360 is about 815.0828178780. The cubic root of 664360 is about 87.2571771011.

It can be divided in two parts, 664 and 360, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 664360 in words is "six hundred sixty-four thousand, three hundred sixty".