12661833078287 has 2 divisors, whose sum is σ = 12661833078288. Its totient is φ = 12661833078286.

The previous prime is 12661833078269. The next prime is 12661833078311. The reversal of 12661833078287 is 78287033816621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12661833078287 - 2⁸ = 12661833078031 is a prime.

It is a super-3 number, since 3×12661833078287³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12661833078217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330916539143 + 6330916539144.

It is an arithmetic number, because the mean of its divisors is an integer number (6330916539144).

Almost surely, 2^{12661833078287} is an apocalyptic number.

12661833078287 is a deficient number, since it is larger than the sum of its proper divisors (1).

12661833078287 is an equidigital number, since it uses as much as digits as its factorization.

12661833078287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32514048, while the sum is 62.

The spelling of 12661833078287 in words is "twelve trillion, six hundred sixty-one billion, eight hundred thirty-three million, seventy-eight thousand, two hundred eighty-seven".