728663366887 has 2 divisors, whose sum is σ = 728663366888. Its totient is φ = 728663366886.

The previous prime is 728663366819. The next prime is 728663366903. The reversal of 728663366887 is 788663366827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728663366887 - 2³⁵ = 694303628519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728663361887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364331683443 + 364331683444.

It is an arithmetic number, because the mean of its divisors is an integer number (364331683444).

Almost surely, 2^728663366887 is an apocalyptic number.

728663366887 is a deficient number, since it is larger than the sum of its proper divisors (1).

728663366887 is an equidigital number, since it uses as much as digits as its factorization.

728663366887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 585252864, while the sum is 70.

The spelling of 728663366887 in words is "seven hundred twenty-eight billion, six hundred sixty-three million, three hundred sixty-six thousand, eight hundred eighty-seven".