6718999679 has 4 divisors (see below), whose sum is σ = 7678856784. Its totient is φ = 5759142576.

The previous prime is 6718999663. The next prime is 6718999699. The reversal of 6718999679 is 9769998176.

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

It is a cyclic number.

It is not a de Polignac number, because 6718999679 - 2⁴ = 6718999663 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 (6718999619) 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, 479928542 + ... + 479928555.

It is an arithmetic number, because the mean of its divisors is an integer number (1919714196).

Almost surely, 2^6718999679 is an apocalyptic number.

6718999679 is a deficient number, since it is larger than the sum of its proper divisors (959857105).

6718999679 is an equidigital number, since it uses as much as digits as its factorization.

6718999679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959857104.

The product of its digits is 92588832, while the sum is 71.

The square root of 6718999679 is about 81969.5045672474. The cubic root of 6718999679 is about 1886.9839523936.

The spelling of 6718999679 in words is "six billion, seven hundred eighteen million, nine hundred ninety-nine thousand, six hundred seventy-nine".