2566840287 has 32 divisors (see below), whose sum is σ = 3787660800. Its totient is φ = 1533265920.

The previous prime is 2566840279. The next prime is 2566840327. The reversal of 2566840287 is 7820486652.

It is not a de Polignac number, because 2566840287 - 2³ = 2566840279 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566840277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 840339 + ... + 843387.

It is an arithmetic number, because the mean of its divisors is an integer number (118364400).

Almost surely, 2^2566840287 is an apocalyptic number.

2566840287 is a deficient number, since it is larger than the sum of its proper divisors (1220820513).

2566840287 is a wasteful number, since it uses less digits than its factorization.

2566840287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3423.

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 2566840287 is about 50663.9939898149. The cubic root of 2566840287 is about 1369.1980827415.

The spelling of 2566840287 in words is "two billion, five hundred sixty-six million, eight hundred forty thousand, two hundred eighty-seven".