663784888346947 has 2 divisors, whose sum is σ = 663784888346948. Its totient is φ = 663784888346946.

The previous prime is 663784888346939. The next prime is 663784888347037. The reversal of 663784888346947 is 749643888487366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663784888346947 - 2³ = 663784888346939 is a prime.

It is a super-2 number, since 2×663784888346947² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (663784888341947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331892444173473 + 331892444173474.

It is an arithmetic number, because the mean of its divisors is an integer number (331892444173474).

Almost surely, 2^{663784888346947} is an apocalyptic number.

663784888346947 is a deficient number, since it is larger than the sum of its proper divisors (1).

663784888346947 is an equidigital number, since it uses as much as digits as its factorization.

663784888346947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224737099776, while the sum is 91.

The spelling of 663784888346947 in words is "six hundred sixty-three trillion, seven hundred eighty-four billion, eight hundred eighty-eight million, three hundred forty-six thousand, nine hundred forty-seven".