663347743361 has 2 divisors, whose sum is σ = 663347743362. Its totient is φ = 663347743360.

The previous prime is 663347743351. The next prime is 663347743367. The reversal of 663347743361 is 163347743366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370812795136 + 292534948225 = 608944^2 + 540865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663347743361 is a prime.

It is a super-2 number, since 2×663347743361² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (663347743367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331673871680 + 331673871681.

It is an arithmetic number, because the mean of its divisors is an integer number (331673871681).

Almost surely, 2^663347743361 is an apocalyptic number.

It is an amenable number.

663347743361 is a deficient number, since it is larger than the sum of its proper divisors (1).

663347743361 is an equidigital number, since it uses as much as digits as its factorization.

663347743361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 53.

The spelling of 663347743361 in words is "six hundred sixty-three billion, three hundred forty-seven million, seven hundred forty-three thousand, three hundred sixty-one".