1663498468771 has 2 divisors, whose sum is σ = 1663498468772. Its totient is φ = 1663498468770.

The previous prime is 1663498468757. The next prime is 1663498468817. The reversal of 1663498468771 is 1778648943661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1663498468771 - 2⁵ = 1663498468739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1663498468771.

It is not a weakly prime, because it can be changed into another prime (1663498462771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831749234385 + 831749234386.

It is an arithmetic number, because the mean of its divisors is an integer number (831749234386).

Almost surely, 2^{1663498468771} is an apocalyptic number.

1663498468771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663498468771 is an equidigital number, since it uses as much as digits as its factorization.

1663498468771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 292626432, while the sum is 70.

The spelling of 1663498468771 in words is "one trillion, six hundred sixty-three billion, four hundred ninety-eight million, four hundred sixty-eight thousand, seven hundred seventy-one".