2566765447 has 2 divisors, whose sum is σ = 2566765448. Its totient is φ = 2566765446.

The previous prime is 2566765427. The next prime is 2566765471. The reversal of 2566765447 is 7445676652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2566765447 - 2⁷ = 2566765319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2566765394 and 2566765403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2566765427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283382723 + 1283382724.

It is an arithmetic number, because the mean of its divisors is an integer number (1283382724).

Almost surely, 2^2566765447 is an apocalyptic number.

2566765447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566765447 is an equidigital number, since it uses as much as digits as its factorization.

2566765447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8467200, while the sum is 52.

The square root of 2566765447 is about 50663.2553928387. The cubic root of 2566765447 is about 1369.1847756182.

The spelling of 2566765447 in words is "two billion, five hundred sixty-six million, seven hundred sixty-five thousand, four hundred forty-seven".