2566131878 has 32 divisors (see below), whose sum is σ = 4143312000. Its totient is φ = 1187656704.

The previous prime is 2566131859. The next prime is 2566131881. The reversal of 2566131878 is 8781316652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 742298 + ... + 745746.

It is an arithmetic number, because the mean of its divisors is an integer number (129478500).

Almost surely, 2^2566131878 is an apocalyptic number.

2566131878 is a deficient number, since it is larger than the sum of its proper divisors (1577180122).

2566131878 is a wasteful number, since it uses less digits than its factorization.

2566131878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3824.

The product of its digits is 483840, while the sum is 47.

The square root of 2566131878 is about 50657.0022602996. The cubic root of 2566131878 is about 1369.0721118486.

The spelling of 2566131878 in words is "two billion, five hundred sixty-six million, one hundred thirty-one thousand, eight hundred seventy-eight".