664466503 has 2 divisors, whose sum is σ = 664466504. Its totient is φ = 664466502.

The previous prime is 664466417. The next prime is 664466519. The reversal of 664466503 is 305664466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664466503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664466533) 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 as a sum of consecutive naturals, namely, 332233251 + 332233252.

It is an arithmetic number, because the mean of its divisors is an integer number (332233252).

Almost surely, 2^664466503 is an apocalyptic number.

664466503 is a deficient number, since it is larger than the sum of its proper divisors (1).

664466503 is an equidigital number, since it uses as much as digits as its factorization.

664466503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 40.

The square root of 664466503 is about 25777.2477778370. The cubic root of 664466503 is about 872.6183956048.

The spelling of 664466503 in words is "six hundred sixty-four million, four hundred sixty-six thousand, five hundred three".