2565366647 has 2 divisors, whose sum is σ = 2565366648. Its totient is φ = 2565366646.

The previous prime is 2565366641. The next prime is 2565366667. The reversal of 2565366647 is 7466635652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2565366647 - 2²⁴ = 2548589431 is a prime.

It is a super-2 number, since 2×2565366647² = 13162212067080045218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2565366595 and 2565366604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565366641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282683323 + 1282683324.

It is an arithmetic number, because the mean of its divisors is an integer number (1282683324).

Almost surely, 2^2565366647 is an apocalyptic number.

2565366647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565366647 is an equidigital number, since it uses as much as digits as its factorization.

2565366647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 50.

The square root of 2565366647 is about 50649.4486347087. The cubic root of 2565366647 is about 1368.9360106884.

The spelling of 2565366647 in words is "two billion, five hundred sixty-five million, three hundred sixty-six thousand, six hundred forty-seven".