2566081 has 6 divisors (see below), whose sum is σ = 2985090. Its totient is φ = 2199456.

The previous prime is 2566073. The next prime is 2566093. The reversal of 2566081 is 1806652.

2566081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2371600 + 194481 = 1540^2 + 441^2 .

It is not a de Polignac number, because 2566081 - 2³ = 2566073 is a prime.

It is a super-2 number, since 2×2566081² = 13169543397122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2566001) 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 5 ways as a sum of consecutive naturals, for example, 26136 + ... + 26233.

It is an arithmetic number, because the mean of its divisors is an integer number (497515).

2^2566081 is an apocalyptic number.

It is an amenable number.

2566081 is a deficient number, since it is larger than the sum of its proper divisors (419009).

2566081 is an equidigital number, since it uses as much as digits as its factorization.

2566081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52383 (or 52376 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2566081 is about 1601.8991853422. The cubic root of 2566081 is about 136.9063063715.

Subtracting from 2566081 its product of nonzero digits (2880), we obtain a square (2563201 = 1601²).

The spelling of 2566081 in words is "two million, five hundred sixty-six thousand, eighty-one".