663109443397 has 2 divisors, whose sum is σ = 663109443398. Its totient is φ = 663109443396.

The previous prime is 663109443391. The next prime is 663109443439. The reversal of 663109443397 is 793344901366.

663109443397 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., 395992059841 + 267117383556 = 629279^2 + 516834^2 .

It is a cyclic number.

It is not a de Polignac number, because 663109443397 - 2³ = 663109443389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663109443391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331554721698 + 331554721699.

It is an arithmetic number, because the mean of its divisors is an integer number (331554721699).

Almost surely, 2^663109443397 is an apocalyptic number.

It is an amenable number.

663109443397 is a deficient number, since it is larger than the sum of its proper divisors (1).

663109443397 is an equidigital number, since it uses as much as digits as its factorization.

663109443397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 55.

The spelling of 663109443397 in words is "six hundred sixty-three billion, one hundred nine million, four hundred forty-three thousand, three hundred ninety-seven".