664360201 has 2 divisors, whose sum is σ = 664360202. Its totient is φ = 664360200.

The previous prime is 664360199. The next prime is 664360223. The reversal of 664360201 is 102063466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349652601 + 314707600 = 18699^2 + 17740^2 .

It is a cyclic number.

It is not a de Polignac number, because 664360201 - 2¹ = 664360199 is a prime.

Together with 664360199, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 664360201.

It is not a weakly prime, because it can be changed into another prime (664360231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332180100 + 332180101.

It is an arithmetic number, because the mean of its divisors is an integer number (332180101).

Almost surely, 2^664360201 is an apocalyptic number.

It is an amenable number.

664360201 is a deficient number, since it is larger than the sum of its proper divisors (1).

664360201 is an equidigital number, since it uses as much as digits as its factorization.

664360201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 664360201 is about 25775.1857607273. The cubic root of 664360201 is about 872.5718590088.

The spelling of 664360201 in words is "six hundred sixty-four million, three hundred sixty thousand, two hundred one".