6688340068 has 12 divisors (see below), whose sum is σ = 11742722992. Its totient is φ = 3333276360.

The previous prime is 6688340063. The next prime is 6688340143. The reversal of 6688340068 is 8600438866.

It is not an unprimeable number, because it can be changed into a prime (6688340063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2722038 + ... + 2724493.

Almost surely, 2^6688340068 is an apocalyptic number.

It is an amenable number.

6688340068 is a deficient number, since it is larger than the sum of its proper divisors (5054382924).

6688340068 is a wasteful number, since it uses less digits than its factorization.

6688340068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5446842 (or 5446840 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 49.

The square root of 6688340068 is about 81782.2723333119. The cubic root of 6688340068 is about 1884.1093967036.

The spelling of 6688340068 in words is "six billion, six hundred eighty-eight million, three hundred forty thousand, sixty-eight".