2566800989 has 16 divisors (see below), whose sum is σ = 2759726592. Its totient is φ = 2381584128.

The previous prime is 2566800949. The next prime is 2566801019. The reversal of 2566800989 is 9890086652.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2566800989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2566800989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566800949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111647 + ... + 132659.

It is an arithmetic number, because the mean of its divisors is an integer number (172482912).

Almost surely, 2^2566800989 is an apocalyptic number.

It is an amenable number.

2566800989 is a deficient number, since it is larger than the sum of its proper divisors (192925603).

2566800989 is a wasteful number, since it uses less digits than its factorization.

2566800989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21196.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The square root of 2566800989 is about 50663.6061586619. The cubic root of 2566800989 is about 1369.1910952894.

The spelling of 2566800989 in words is "two billion, five hundred sixty-six million, eight hundred thousand, nine hundred eighty-nine".