6666644445 has 8 divisors (see below), whose sum is σ = 10666631136. Its totient is φ = 3555543696.

The previous prime is 6666644431. The next prime is 6666644473. The reversal of 6666644445 is 5444466666.

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

It is not a de Polignac number, because 6666644445 - 2¹¹ = 6666642397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222221467 + ... + 222221496.

It is an arithmetic number, because the mean of its divisors is an integer number (1333328892).

Almost surely, 2^6666644445 is an apocalyptic number.

It is an amenable number.

6666644445 is a deficient number, since it is larger than the sum of its proper divisors (3999986691).

6666644445 is a wasteful number, since it uses less digits than its factorization.

6666644445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444442971.

The product of its digits is 9953280, while the sum is 51.

The square root of 6666644445 is about 81649.5220132978. The cubic root of 6666644445 is about 1882.0699666208.

It can be divided in two parts, 66666 and 44445, that added together give a palindrome (111111).

The spelling of 6666644445 in words is "six billion, six hundred sixty-six million, six hundred forty-four thousand, four hundred forty-five".