2566764287 has 12 divisors (see below), whose sum is σ = 2644460400. Its totient is φ = 2491251840.

The previous prime is 2566764253. The next prime is 2566764301. The reversal of 2566764287 is 7824676652.

It is a happy number.

It is not a de Polignac number, because 2566764287 - 2¹⁸ = 2566502143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566764247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330683 + ... + 338355.

It is an arithmetic number, because the mean of its divisors is an integer number (220371700).

Almost surely, 2^2566764287 is an apocalyptic number.

2566764287 is a deficient number, since it is larger than the sum of its proper divisors (77696113).

2566764287 is an equidigital number, since it uses as much as digits as its factorization.

2566764287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7954 (or 7913 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 53.

The square root of 2566764287 is about 50663.2439446982. The cubic root of 2566764287 is about 1369.1845693594.

The spelling of 2566764287 in words is "two billion, five hundred sixty-six million, seven hundred sixty-four thousand, two hundred eighty-seven".