13444666689 has 8 divisors (see below), whose sum is σ = 18193778080. Its totient is φ = 8829333216.

The previous prime is 13444666687. The next prime is 13444666693. The reversal of 13444666689 is 98666644431.

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

It is not a de Polignac number, because 13444666689 - 2¹ = 13444666687 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (13444666687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33444244 + ... + 33444645.

It is an arithmetic number, because the mean of its divisors is an integer number (2274222260).

Almost surely, 2^13444666689 is an apocalyptic number.

It is an amenable number.

13444666689 is a deficient number, since it is larger than the sum of its proper divisors (4749111391).

13444666689 is an equidigital number, since it uses as much as digits as its factorization.

13444666689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66888959.

The product of its digits is 17915904, while the sum is 57.

The spelling of 13444666689 in words is "thirteen billion, four hundred forty-four million, six hundred sixty-six thousand, six hundred eighty-nine".