8666644441 has 16 divisors (see below), whose sum is σ = 10668962304. Its totient is φ = 6855632064.

The previous prime is 8666644417. The next prime is 8666644447. The reversal of 8666644441 is 1444466668.

8666644441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 8666644441 - 2⁷ = 8666644313 is a prime.

It is a super-2 number, since 2×8666644441² (a number of 21 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (8666644447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617595 + ... + 631471.

It is an arithmetic number, because the mean of its divisors is an integer number (666810144).

Almost surely, 2^8666644441 is an apocalyptic number.

It is an amenable number.

8666644441 is a deficient number, since it is larger than the sum of its proper divisors (2002317863).

8666644441 is a wasteful number, since it uses less digits than its factorization.

8666644441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20760.

The product of its digits is 2654208, while the sum is 49.

The square root of 8666644441 is about 93094.8142540711. The cubic root of 8666644441 is about 2054.0782933521.

The spelling of 8666644441 in words is "eight billion, six hundred sixty-six million, six hundred forty-four thousand, four hundred forty-one".