4427447666 has 8 divisors (see below), whose sum is σ = 7031828700. Its totient is φ = 2083504768.

The previous prime is 4427447663. The next prime is 4427447671. The reversal of 4427447666 is 6667447244.

It can be written as a sum of positive squares in 2 ways, for example, as 4422915025 + 4532641 = 66505^2 + 2129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4427447663) 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 3 ways as a sum of consecutive naturals, for example, 65109491 + ... + 65109558.

Almost surely, 2^4427447666 is an apocalyptic number.

4427447666 is a deficient number, since it is larger than the sum of its proper divisors (2604381034).

4427447666 is a wasteful number, since it uses less digits than its factorization.

4427447666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130219068.

The product of its digits is 5419008, while the sum is 50.

The square root of 4427447666 is about 66539.0687190616. The cubic root of 4427447666 is about 1642.0428224404.

The spelling of 4427447666 in words is "four billion, four hundred twenty-seven million, four hundred forty-seven thousand, six hundred sixty-six".