6718540679 has 2 divisors, whose sum is σ = 6718540680. Its totient is φ = 6718540678.

The previous prime is 6718540667. The next prime is 6718540723. The reversal of 6718540679 is 9760458176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6718540679 - 2⁴ = 6718540663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6718540679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6718540079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3359270339 + 3359270340.

It is an arithmetic number, because the mean of its divisors is an integer number (3359270340).

Almost surely, 2^6718540679 is an apocalyptic number.

6718540679 is a deficient number, since it is larger than the sum of its proper divisors (1).

6718540679 is an equidigital number, since it uses as much as digits as its factorization.

6718540679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The square root of 6718540679 is about 81966.7046977003. The cubic root of 6718540679 is about 1886.9409824378.

The spelling of 6718540679 in words is "six billion, seven hundred eighteen million, five hundred forty thousand, six hundred seventy-nine".