2566420811 has 2 divisors, whose sum is σ = 2566420812. Its totient is φ = 2566420810.

The previous prime is 2566420783. The next prime is 2566420841. The reversal of 2566420811 is 1180246652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2566420811 - 2¹⁴ = 2566404427 is a prime.

It is not a weakly prime, because it can be changed into another prime (2566420841) 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, 1283210405 + 1283210406.

It is an arithmetic number, because the mean of its divisors is an integer number (1283210406).

Almost surely, 2^2566420811 is an apocalyptic number.

2566420811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566420811 is an equidigital number, since it uses as much as digits as its factorization.

2566420811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 2566420811 is about 50659.8540365051. The cubic root of 2566420811 is about 1369.1234933683.

The spelling of 2566420811 in words is "two billion, five hundred sixty-six million, four hundred twenty thousand, eight hundred eleven".