6669144321 has 16 divisors (see below), whose sum is σ = 10206129024. Its totient is φ = 3794580864.

The previous prime is 6669144259. The next prime is 6669144367. The reversal of 6669144321 is 1234419666.

It is a happy number.

6669144321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6669144321 - 2¹⁰ = 6669143297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6669144821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676606 + ... + 686391.

It is an arithmetic number, because the mean of its divisors is an integer number (637883064).

Almost surely, 2^6669144321 is an apocalyptic number.

It is an amenable number.

6669144321 is a deficient number, since it is larger than the sum of its proper divisors (3536984703).

6669144321 is a wasteful number, since it uses less digits than its factorization.

6669144321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363240.

The product of its digits is 186624, while the sum is 42.

The square root of 6669144321 is about 81664.8291555184. The cubic root of 6669144321 is about 1882.3051850835.

The spelling of 6669144321 in words is "six billion, six hundred sixty-nine million, one hundred forty-four thousand, three hundred twenty-one".