6667278961313 has 2 divisors, whose sum is σ = 6667278961314. Its totient is φ = 6667278961312.

The previous prime is 6667278961279. The next prime is 6667278961331. The reversal of 6667278961313 is 3131698727666.

Together with next prime (6667278961331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4373820111424 + 2293458849889 = 2091368^2 + 1514417^2 .

It is a cyclic number.

It is not a de Polignac number, because 6667278961313 - 2¹² = 6667278957217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6667278961313.

It is not a weakly prime, because it can be changed into another prime (6667278961393) 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, 3333639480656 + 3333639480657.

It is an arithmetic number, because the mean of its divisors is an integer number (3333639480657).

Almost surely, 2^{6667278961313} is an apocalyptic number.

It is an amenable number.

6667278961313 is a deficient number, since it is larger than the sum of its proper divisors (1).

6667278961313 is an equidigital number, since it uses as much as digits as its factorization.

6667278961313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82301184, while the sum is 65.

The spelling of 6667278961313 in words is "six trillion, six hundred sixty-seven billion, two hundred seventy-eight million, nine hundred sixty-one thousand, three hundred thirteen".