2666123468201 has 2 divisors, whose sum is σ = 2666123468202. Its totient is φ = 2666123468200.

The previous prime is 2666123468191. The next prime is 2666123468231. The reversal of 2666123468201 is 1028643216662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2658037861801 + 8085606400 = 1630349^2 + 89920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2666123468201 is a prime.

It is not a weakly prime, because it can be changed into another prime (2666123468231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333061734100 + 1333061734101.

It is an arithmetic number, because the mean of its divisors is an integer number (1333061734101).

Almost surely, 2^{2666123468201} is an apocalyptic number.

It is an amenable number.

2666123468201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666123468201 is an equidigital number, since it uses as much as digits as its factorization.

2666123468201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 2666123468201 in words is "two trillion, six hundred sixty-six billion, one hundred twenty-three million, four hundred sixty-eight thousand, two hundred one".