6516628717 has 8 divisors (see below), whose sum is σ = 6983093376. Its totient is φ = 6059401152.

The previous prime is 6516628691. The next prime is 6516628747. The reversal of 6516628717 is 7178266156.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6516628717 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 (6516628747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2307813 + ... + 2310634.

It is an arithmetic number, because the mean of its divisors is an integer number (872886672).

Almost surely, 2^6516628717 is an apocalyptic number.

It is an amenable number.

6516628717 is a deficient number, since it is larger than the sum of its proper divisors (466464659).

6516628717 is a wasteful number, since it uses less digits than its factorization.

6516628717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4618547.

The product of its digits is 846720, while the sum is 49.

The square root of 6516628717 is about 80725.6385357217. The cubic root of 6516628717 is about 1867.8456814600.

The spelling of 6516628717 in words is "six billion, five hundred sixteen million, six hundred twenty-eight thousand, seven hundred seventeen".