2566997767 has 2 divisors, whose sum is σ = 2566997768. Its totient is φ = 2566997766.

The previous prime is 2566997753. The next prime is 2566997779. The reversal of 2566997767 is 7677996652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2566997767 - 2¹¹ = 2566995719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2566997699 and 2566997708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2566997737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283498883 + 1283498884.

It is an arithmetic number, because the mean of its divisors is an integer number (1283498884).

Almost surely, 2^2566997767 is an apocalyptic number.

2566997767 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566997767 is an equidigital number, since it uses as much as digits as its factorization.

2566997767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60011280, while the sum is 64.

The square root of 2566997767 is about 50665.5481269077. The cubic root of 2566997767 is about 1369.2260830429.

The spelling of 2566997767 in words is "two billion, five hundred sixty-six million, nine hundred ninety-seven thousand, seven hundred sixty-seven".