2566420803 has 12 divisors (see below), whose sum is σ = 3712686120. Its totient is φ = 1708346976.

The previous prime is 2566420783. The next prime is 2566420811. The reversal of 2566420803 is 3080246652.

2566420803 is a `hidden beast` number, since 2 + 5 + 6 + 642 + 0 + 8 + 0 + 3 = 666.

2566420803 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2566420803 - 2⁵ = 2566420771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2566420873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210426 + ... + 222287.

It is an arithmetic number, because the mean of its divisors is an integer number (309390510).

Almost surely, 2^2566420803 is an apocalyptic number.

2566420803 is a deficient number, since it is larger than the sum of its proper divisors (1146265317).

2566420803 is a wasteful number, since it uses less digits than its factorization.

2566420803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433378 (or 433375 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 2566420803 is about 50659.8539575471. The cubic root of 2566420803 is about 1369.1234919457.

The spelling of 2566420803 in words is "two billion, five hundred sixty-six million, four hundred twenty thousand, eight hundred three".