2505566 has 24 divisors (see below), whose sum is σ = 4496616. Its totient is φ = 1043280.

The previous prime is 2505557. The next prime is 2505611. The reversal of 2505566 is 6655052.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 3281 + ... + 3971.

It is an arithmetic number, because the mean of its divisors is an integer number (187359).

2^2505566 is an apocalyptic number.

2505566 is a deficient number, since it is larger than the sum of its proper divisors (1991050).

2505566 is a wasteful number, since it uses less digits than its factorization.

2505566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 2505566 is about 1582.8979752340. The cubic root of 2505566 is about 135.8215291619.

The spelling of 2505566 in words is "two million, five hundred five thousand, five hundred sixty-six".