6613621313 has 16 divisors (see below), whose sum is σ = 7357658112. Its totient is φ = 5903496000.

The previous prime is 6613621279. The next prime is 6613621331. The reversal of 6613621313 is 3131263166.

It is a cyclic number.

It is not a de Polignac number, because 6613621313 - 2⁶ = 6613621249 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6613621313.

It is not an unprimeable number, because it can be changed into a prime (6613621513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603503 + ... + 614363.

It is an arithmetic number, because the mean of its divisors is an integer number (459853632).

Almost surely, 2^6613621313 is an apocalyptic number.

It is an amenable number.

6613621313 is a deficient number, since it is larger than the sum of its proper divisors (744036799).

6613621313 is a wasteful number, since it uses less digits than its factorization.

6613621313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12416.

The product of its digits is 11664, while the sum is 32.

The square root of 6613621313 is about 81324.1742226750. The cubic root of 6613621313 is about 1877.0670005481.

Adding to 6613621313 its reverse (3131263166), we get a palindrome (9744884479).

The spelling of 6613621313 in words is "six billion, six hundred thirteen million, six hundred twenty-one thousand, three hundred thirteen".