2255666 has 12 divisors (see below), whose sum is σ = 3936078. Its totient is φ = 966672.

The previous prime is 2255663. The next prime is 2255677. The reversal of 2255666 is 6665522.

It can be written as a sum of positive squares in only one way, i.e., 1901641 + 354025 = 1379^2 + 595^2 .

It is a d-powerful number, because it can be written as 2⁴ + 2⁹ + 5² + 5⁶ + 6⁷ + 6⁷ + 6⁸ .

It is a Curzon number.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2255663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11411 + ... + 11606.

2^2255666 is an apocalyptic number.

2255666 is a deficient number, since it is larger than the sum of its proper divisors (1680412).

2255666 is a wasteful number, since it uses less digits than its factorization.

2255666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23033 (or 23026 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 2255666 is about 1501.8874791408. The cubic root of 2255666 is about 131.1469709970.

It can be divided in two parts, 22556 and 66, that added together give a palindrome (22622).

The spelling of 2255666 in words is "two million, two hundred fifty-five thousand, six hundred sixty-six".