664411403 has 2 divisors, whose sum is σ = 664411404. Its totient is φ = 664411402.

The previous prime is 664411393. The next prime is 664411441. The reversal of 664411403 is 304114466.

664411403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664411403 - 2⁴ = 664411387 is a prime.

It is not a weakly prime, because it can be changed into another prime (664411453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332205701 + 332205702.

It is an arithmetic number, because the mean of its divisors is an integer number (332205702).

Almost surely, 2^664411403 is an apocalyptic number.

664411403 is a deficient number, since it is larger than the sum of its proper divisors (1).

664411403 is an equidigital number, since it uses as much as digits as its factorization.

664411403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 664411403 is about 25776.1789837051. The cubic root of 664411403 is about 872.5942746986.

Adding to 664411403 its reverse (304114466), we get a palindrome (968525869).

The spelling of 664411403 in words is "six hundred sixty-four million, four hundred eleven thousand, four hundred three".