6678479807999 has 4 divisors (see below), whose sum is σ = 6678805274640. Its totient is φ = 6678154341360.

The previous prime is 6678479807941. The next prime is 6678479808053. The reversal of 6678479807999 is 9997089748766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6678479807999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6678479807939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162702539 + ... + 162743580.

It is an arithmetic number, because the mean of its divisors is an integer number (1669701318660).

Almost surely, 2^{6678479807999} is an apocalyptic number.

6678479807999 is a deficient number, since it is larger than the sum of its proper divisors (325466641).

6678479807999 is a wasteful number, since it uses less digits than its factorization.

6678479807999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325466640.

The product of its (nonzero) digits is 20739898368, while the sum is 89.

The spelling of 6678479807999 in words is "six trillion, six hundred seventy-eight billion, four hundred seventy-nine million, eight hundred seven thousand, nine hundred ninety-nine".