12345666666533 has 2 divisors, whose sum is σ = 12345666666534. Its totient is φ = 12345666666532.

The previous prime is 12345666666511. The next prime is 12345666666611. The reversal of 12345666666533 is 33566666654321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10616922923044 + 1728743743489 = 3258362^2 + 1314817^2 .

It is a cyclic number.

It is not a de Polignac number, because 12345666666533 - 2⁶ = 12345666666469 is a prime.

It is a super-2 number, since 2×12345666666533² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12345666666833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172833333266 + 6172833333267.

It is an arithmetic number, because the mean of its divisors is an integer number (6172833333267).

Almost surely, 2^{12345666666533} is an apocalyptic number.

It is an amenable number.

12345666666533 is a deficient number, since it is larger than the sum of its proper divisors (1).

12345666666533 is an equidigital number, since it uses as much as digits as its factorization.

12345666666533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 251942400, while the sum is 62.

The spelling of 12345666666533 in words is "twelve trillion, three hundred forty-five billion, six hundred sixty-six million, six hundred sixty-six thousand, five hundred thirty-three".