663424045125791 has 2 divisors, whose sum is σ = 663424045125792. Its totient is φ = 663424045125790.

The previous prime is 663424045125577. The next prime is 663424045125797. The reversal of 663424045125791 is 197521540424366.

It is a happy number.

663424045125791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663424045125791 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663424045125791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663424045125797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331712022562895 + 331712022562896.

It is an arithmetic number, because the mean of its divisors is an integer number (331712022562896).

Almost surely, 2^{663424045125791} is an apocalyptic number.

663424045125791 is a deficient number, since it is larger than the sum of its proper divisors (1).

663424045125791 is an equidigital number, since it uses as much as digits as its factorization.

663424045125791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43545600, while the sum is 59.

The spelling of 663424045125791 in words is "six hundred sixty-three trillion, four hundred twenty-four billion, forty-five million, one hundred twenty-five thousand, seven hundred ninety-one".