4427365666 has 4 divisors (see below), whose sum is σ = 6641048502. Its totient is φ = 2213682832.

The previous prime is 4427365639. The next prime is 4427365667. The reversal of 4427365666 is 6665637244.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4398475041 + 28890625 = 66321^2 + 5375^2 .

It is not an unprimeable number, because it can be changed into a prime (4427365667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106841415 + ... + 1106841418.

Almost surely, 2^4427365666 is an apocalyptic number.

4427365666 is a deficient number, since it is larger than the sum of its proper divisors (2213682836).

4427365666 is a wasteful number, since it uses less digits than its factorization.

4427365666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213682835.

The product of its digits is 4354560, while the sum is 49.

The square root of 4427365666 is about 66538.4525368602. The cubic root of 4427365666 is about 1642.0326850465.

The spelling of 4427365666 in words is "four billion, four hundred twenty-seven million, three hundred sixty-five thousand, six hundred sixty-six".