2566398841 has 2 divisors, whose sum is σ = 2566398842. Its totient is φ = 2566398840.

The previous prime is 2566398833. The next prime is 2566398853. The reversal of 2566398841 is 1488936652.

2566398841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1421591616 + 1144807225 = 37704^2 + 33835^2 .

It is a cyclic number.

It is not a de Polignac number, because 2566398841 - 2³ = 2566398833 is a prime.

It is a super-2 number, since 2×2566398841² = 13172806022172286562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2566398641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283199420 + 1283199421.

It is an arithmetic number, because the mean of its divisors is an integer number (1283199421).

Almost surely, 2^2566398841 is an apocalyptic number.

It is an amenable number.

2566398841 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566398841 is an equidigital number, since it uses as much as digits as its factorization.

2566398841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 52.

The square root of 2566398841 is about 50659.6371976744. The cubic root of 2566398841 is about 1369.1195865358.

The spelling of 2566398841 in words is "two billion, five hundred sixty-six million, three hundred ninety-eight thousand, eight hundred forty-one".