6517421679 has 8 divisors (see below), whose sum is σ = 8970214912. Its totient is φ = 4204788120.

The previous prime is 6517421621. The next prime is 6517421693. The reversal of 6517421679 is 9761247156.

6517421679 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6517421679 - 2¹² = 6517417583 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 (6517421279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35039809 + ... + 35039994.

It is an arithmetic number, because the mean of its divisors is an integer number (1121276864).

Almost surely, 2^6517421679 is an apocalyptic number.

6517421679 is a deficient number, since it is larger than the sum of its proper divisors (2452793233).

6517421679 is a wasteful number, since it uses less digits than its factorization.

6517421679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70079837.

The product of its digits is 635040, while the sum is 48.

The square root of 6517421679 is about 80730.5498494839. The cubic root of 6517421679 is about 1867.9214399869.

The spelling of 6517421679 in words is "six billion, five hundred seventeen million, four hundred twenty-one thousand, six hundred seventy-nine".