2566125791 has 2 divisors, whose sum is σ = 2566125792. Its totient is φ = 2566125790.

The previous prime is 2566125767. The next prime is 2566125799. The reversal of 2566125791 is 1975216652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2566125791 - 2¹⁴ = 2566109407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2566125799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283062895 + 1283062896.

It is an arithmetic number, because the mean of its divisors is an integer number (1283062896).

Almost surely, 2^2566125791 is an apocalyptic number.

2566125791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566125791 is an equidigital number, since it uses as much as digits as its factorization.

2566125791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 2566125791 is about 50656.9421797250. The cubic root of 2566125791 is about 1369.0710293440.

The spelling of 2566125791 in words is "two billion, five hundred sixty-six million, one hundred twenty-five thousand, seven hundred ninety-one".