2566642567 has 2 divisors, whose sum is σ = 2566642568. Its totient is φ = 2566642566.

The previous prime is 2566642487. The next prime is 2566642571. The reversal of 2566642567 is 7652466652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2566642567 - 2¹¹ = 2566640519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2566642567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2566642577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283321283 + 1283321284.

It is an arithmetic number, because the mean of its divisors is an integer number (1283321284).

Almost surely, 2^2566642567 is an apocalyptic number.

2566642567 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566642567 is an equidigital number, since it uses as much as digits as its factorization.

2566642567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 49.

The square root of 2566642567 is about 50662.0426650959. The cubic root of 2566642567 is about 1369.1629260552.

The spelling of 2566642567 in words is "two billion, five hundred sixty-six million, six hundred forty-two thousand, five hundred sixty-seven".