2243665566 has 24 divisors (see below), whose sum is σ = 4899558144. Its totient is φ = 741998880.

The previous prime is 2243665561. The next prime is 2243665603. The reversal of 2243665566 is 6655663422.

2243665566 is a `hidden beast` number, since 2 + 24 + 3 + 6 + 65 + 566 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2243665561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 488455 + ... + 493026.

It is an arithmetic number, because the mean of its divisors is an integer number (204148256).

Almost surely, 2^2243665566 is an apocalyptic number.

2243665566 is an abundant number, since it is smaller than the sum of its proper divisors (2655892578).

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

2243665566 is a wasteful number, since it uses less digits than its factorization.

2243665566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981616 (or 981613 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 45.

The square root of 2243665566 is about 47367.3470441400. The cubic root of 2243665566 is about 1309.1398440172.

The spelling of 2243665566 in words is "two billion, two hundred forty-three million, six hundred sixty-five thousand, five hundred sixty-six".