6709721068 has 36 divisors (see below), whose sum is σ = 12211244640. Its totient is φ = 3222106944.

The previous prime is 6709721059. The next prime is 6709721099. The reversal of 6709721068 is 8601279076.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6082605 + ... + 6083707.

It is an arithmetic number, because the mean of its divisors is an integer number (339201240).

Almost surely, 2^6709721068 is an apocalyptic number.

It is an amenable number.

6709721068 is a deficient number, since it is larger than the sum of its proper divisors (5501523572).

6709721068 is a wasteful number, since it uses less digits than its factorization.

6709721068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 6709721068 is about 81912.8870691297. The cubic root of 6709721068 is about 1886.1149413014.

The spelling of 6709721068 in words is "six billion, seven hundred nine million, seven hundred twenty-one thousand, sixty-eight".