2256666 has 16 divisors (see below), whose sum is σ = 4528704. Its totient is φ = 749664.

The previous prime is 2256637. The next prime is 2256673. The reversal of 2256666 is 6666522.

2256666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×2256666³ = 34476495333631248888, which contains 333 as substring.

It is a plaindrome in base 10.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2331 + ... + 3153.

It is an arithmetic number, because the mean of its divisors is an integer number (283044).

2^2256666 is an apocalyptic number.

2256666 is an abundant number, since it is smaller than the sum of its proper divisors (2272038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2256666 is a wasteful number, since it uses less digits than its factorization.

2256666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285.

The product of its digits is 25920, while the sum is 33.

The square root of 2256666 is about 1502.2203566721. The cubic root of 2256666 is about 131.1663485106.

The spelling of 2256666 in words is "two million, two hundred fifty-six thousand, six hundred sixty-six".