2666313355361 has 2 divisors, whose sum is σ = 2666313355362. Its totient is φ = 2666313355360.

The previous prime is 2666313355357. The next prime is 2666313355373. The reversal of 2666313355361 is 1635533136662.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2323246608400 + 343066746961 = 1524220^2 + 585719^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666313355361 - 2² = 2666313355357 is a prime.

It is not a weakly prime, because it can be changed into another prime (2666313355351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333156677680 + 1333156677681.

It is an arithmetic number, because the mean of its divisors is an integer number (1333156677681).

Almost surely, 2^{2666313355361} is an apocalyptic number.

It is an amenable number.

2666313355361 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666313355361 is an equidigital number, since it uses as much as digits as its factorization.

2666313355361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 50.

The spelling of 2666313355361 in words is "two trillion, six hundred sixty-six billion, three hundred thirteen million, three hundred fifty-five thousand, three hundred sixty-one".