6668389544 has 16 divisors (see below), whose sum is σ = 12506413920. Its totient is φ = 3333345840.

The previous prime is 6668389501. The next prime is 6668389591. The reversal of 6668389544 is 4459838666.

It is a happy number.

It is a super-2 number, since 2×6668389544² = 88934838221057055872, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 72092 + ... + 136139.

It is an arithmetic number, because the mean of its divisors is an integer number (781650870).

Almost surely, 2^6668389544 is an apocalyptic number.

It is an amenable number.

6668389544 is a deficient number, since it is larger than the sum of its proper divisors (5838024376).

6668389544 is a wasteful number, since it uses less digits than its factorization.

6668389544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212240 (or 212236 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 59.

The square root of 6668389544 is about 81660.2078371100. The cubic root of 6668389544 is about 1882.2341727620.

The spelling of 6668389544 in words is "six billion, six hundred sixty-eight million, three hundred eighty-nine thousand, five hundred forty-four".