6479738668 has 24 divisors (see below), whose sum is σ = 12605747840. Its totient is φ = 2894175360.

The previous prime is 6479738659. The next prime is 6479738669. The reversal of 6479738668 is 8668379746.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6479738669) 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, 2008233 + ... + 2011456.

Almost surely, 2^6479738668 is an apocalyptic number.

It is an amenable number.

6479738668 is a deficient number, since it is larger than the sum of its proper divisors (6126009172).

6479738668 is a wasteful number, since it uses less digits than its factorization.

6479738668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4019737 (or 4019735 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 64.

The square root of 6479738668 is about 80496.8239621912. The cubic root of 6479738668 is about 1864.3144409118.

The spelling of 6479738668 in words is "six billion, four hundred seventy-nine million, seven hundred thirty-eight thousand, six hundred sixty-eight".