664381201 has 16 divisors (see below), whose sum is σ = 731289600. Its totient is φ = 598585680.

The previous prime is 664381171. The next prime is 664381217. The reversal of 664381201 is 102183466.

It is a happy number.

664381201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664381201 - 2⁵ = 664381169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664381901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 802950 + ... + 803776.

It is an arithmetic number, because the mean of its divisors is an integer number (45705600).

Almost surely, 2^664381201 is an apocalyptic number.

It is an amenable number.

664381201 is a deficient number, since it is larger than the sum of its proper divisors (66908399).

664381201 is a wasteful number, since it uses less digits than its factorization.

664381201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 664381201 is about 25775.5931260563. The cubic root of 664381201 is about 872.5810527242.

The spelling of 664381201 in words is "six hundred sixty-four million, three hundred eighty-one thousand, two hundred one".