6627988947 has 32 divisors (see below), whose sum is σ = 9497295360. Its totient is φ = 4103456000.

The previous prime is 6627988943. The next prime is 6627988949. The reversal of 6627988947 is 7498897266.

It is a cyclic number.

It is not a de Polignac number, because 6627988947 - 2² = 6627988943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6627988943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240172 + ... + 266342.

It is an arithmetic number, because the mean of its divisors is an integer number (296790480).

Almost surely, 2^6627988947 is an apocalyptic number.

6627988947 is a deficient number, since it is larger than the sum of its proper divisors (2869306413).

6627988947 is a wasteful number, since it uses less digits than its factorization.

6627988947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26315.

The product of its digits is 73156608, while the sum is 66.

The square root of 6627988947 is about 81412.4618654908. The cubic root of 6627988947 is about 1878.4252834253.

The spelling of 6627988947 in words is "six billion, six hundred twenty-seven million, nine hundred eighty-eight thousand, nine hundred forty-seven".