663899377 has 2 divisors, whose sum is σ = 663899378. Its totient is φ = 663899376.

The previous prime is 663899371. The next prime is 663899413. The reversal of 663899377 is 773998366.

663899377 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 can be written as a sum of positive squares in only one way, i.e., 457574881 + 206324496 = 21391^2 + 14364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663899377 is a prime.

It is not a weakly prime, because it can be changed into another prime (663899371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331949688 + 331949689.

It is an arithmetic number, because the mean of its divisors is an integer number (331949689).

Almost surely, 2^663899377 is an apocalyptic number.

It is an amenable number.

663899377 is a deficient number, since it is larger than the sum of its proper divisors (1).

663899377 is an equidigital number, since it uses as much as digits as its factorization.

663899377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10287648, while the sum is 58.

The square root of 663899377 is about 25766.2449146165. The cubic root of 663899377 is about 872.3700633260.

The spelling of 663899377 in words is "six hundred sixty-three million, eight hundred ninety-nine thousand, three hundred seventy-seven".