2566776679 has 2 divisors, whose sum is σ = 2566776680. Its totient is φ = 2566776678.

The previous prime is 2566776649. The next prime is 2566776713. The reversal of 2566776679 is 9766776652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2566776679 - 2⁷ = 2566776551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2566776629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283388339 + 1283388340.

It is an arithmetic number, because the mean of its divisors is an integer number (1283388340).

Almost surely, 2^2566776679 is an apocalyptic number.

2566776679 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566776679 is an equidigital number, since it uses as much as digits as its factorization.

2566776679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40007520, while the sum is 61.

The square root of 2566776679 is about 50663.3662422860. The cubic root of 2566776679 is about 1369.1867727701.

The spelling of 2566776679 in words is "two billion, five hundred sixty-six million, seven hundred seventy-six thousand, six hundred seventy-nine".