6618630313 has 4 divisors (see below), whose sum is σ = 6623076820. Its totient is φ = 6614183808.

The previous prime is 6618630307. The next prime is 6618630379. The reversal of 6618630313 is 3130368166.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2326808169 + 4291822144 = 48237^2 + 65512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6618630313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6618660313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2221020 + ... + 2223997.

It is an arithmetic number, because the mean of its divisors is an integer number (1655769205).

Almost surely, 2^6618630313 is an apocalyptic number.

It is an amenable number.

6618630313 is a deficient number, since it is larger than the sum of its proper divisors (4446507).

6618630313 is a wasteful number, since it uses less digits than its factorization.

6618630313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446506.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 6618630313 is about 81354.9648945902. The cubic root of 6618630313 is about 1877.5407629789.

Adding to 6618630313 its reverse (3130368166), we get a palindrome (9748998479).

The spelling of 6618630313 in words is "six billion, six hundred eighteen million, six hundred thirty thousand, three hundred thirteen".