12780066172833 has 8 divisors (see below), whose sum is σ = 18933431367200. Its totient is φ = 8520044115204.

The previous prime is 12780066172831. The next prime is 12780066172843. The reversal of 12780066172833 is 33827166008721.

It is a happy number.

12780066172833 is a `hidden beast` number, since 12 + 7 + 8 + 0 + 0 + 6 + 617 + 2 + 8 + 3 + 3 = 666.

It is not a de Polignac number, because 12780066172833 - 2¹ = 12780066172831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12780066172833.

It is not an unprimeable number, because it can be changed into a prime (12780066172831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236667892063 + ... + 236667892116.

It is an arithmetic number, because the mean of its divisors is an integer number (2366678920900).

Almost surely, 2^{12780066172833} is an apocalyptic number.

It is an amenable number.

12780066172833 is a deficient number, since it is larger than the sum of its proper divisors (6153365194367).

12780066172833 is an equidigital number, since it uses as much as digits as its factorization.

12780066172833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473335784188 (or 473335784182 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 12780066172833 in words is "twelve trillion, seven hundred eighty billion, sixty-six million, one hundred seventy-two thousand, eight hundred thirty-three".