664247201 has 16 divisors (see below), whose sum is σ = 706621440. Its totient is φ = 622656720.

The previous prime is 664247197. The next prime is 664247209. The reversal of 664247201 is 102742466.

It is a cyclic number.

It is not a de Polignac number, because 664247201 - 2² = 664247197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (664247209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 893636 + ... + 894378.

It is an arithmetic number, because the mean of its divisors is an integer number (44163840).

Almost surely, 2^664247201 is an apocalyptic number.

It is an amenable number.

664247201 is a deficient number, since it is larger than the sum of its proper divisors (42374239).

664247201 is a wasteful number, since it uses less digits than its factorization.

664247201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 664247201 is about 25772.9936367509. The cubic root of 664247201 is about 872.5223847373.

Adding to 664247201 its reverse (102742466), we get a palindrome (766989667).

The spelling of 664247201 in words is "six hundred sixty-four million, two hundred forty-seven thousand, two hundred one".