664220803 has 2 divisors, whose sum is σ = 664220804. Its totient is φ = 664220802.

The previous prime is 664220801. The next prime is 664220819. The reversal of 664220803 is 308022466.

664220803 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 664220803 - 2¹ = 664220801 is a prime.

Together with 664220801, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (664220801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332110401 + 332110402.

It is an arithmetic number, because the mean of its divisors is an integer number (332110402).

Almost surely, 2^664220803 is an apocalyptic number.

664220803 is a deficient number, since it is larger than the sum of its proper divisors (1).

664220803 is an equidigital number, since it uses as much as digits as its factorization.

664220803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 664220803 is about 25772.4815064440. The cubic root of 664220803 is about 872.5108262136.

The spelling of 664220803 in words is "six hundred sixty-four million, two hundred twenty thousand, eight hundred three".