664339201 has 4 divisors (see below), whose sum is σ = 673439812. Its totient is φ = 655238592.

The previous prime is 664339187. The next prime is 664339211. The reversal of 664339201 is 102933466.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170433025 + 493906176 = 13055^2 + 22224^2 .

It is a cyclic number.

It is not a de Polignac number, because 664339201 - 2¹³ = 664331009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664339211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4550196 + ... + 4550341.

It is an arithmetic number, because the mean of its divisors is an integer number (168359953).

Almost surely, 2^664339201 is an apocalyptic number.

It is an amenable number.

664339201 is a deficient number, since it is larger than the sum of its proper divisors (9100611).

664339201 is an equidigital number, since it uses as much as digits as its factorization.

664339201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9100610.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 664339201 is about 25774.7783889600. The cubic root of 664339201 is about 872.5626650995.

The spelling of 664339201 in words is "six hundred sixty-four million, three hundred thirty-nine thousand, two hundred one".