2566805 has 16 divisors (see below), whose sum is σ = 3326400. Its totient is φ = 1895040.

The previous prime is 2566787. The next prime is 2566807. The reversal of 2566805 is 5086652.

It is a happy number.

2566805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2566805 - 2⁸ = 2566549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3566 + ... + 4224.

It is an arithmetic number, because the mean of its divisors is an integer number (207900).

2^2566805 is an apocalyptic number.

It is an amenable number.

2566805 is a deficient number, since it is larger than the sum of its proper divisors (759595).

2566805 is a wasteful number, since it uses less digits than its factorization.

2566805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2566805 is about 1602.1251511664. The cubic root of 2566805 is about 136.9191808476.

The spelling of 2566805 in words is "two million, five hundred sixty-six thousand, eight hundred five".