6813664066 has 8 divisors (see below), whose sum is σ = 11149632144. Its totient is φ = 3097120020.

The previous prime is 6813664063. The next prime is 6813664069. The reversal of 6813664066 is 6604663186.

It is an interprime number because it is at equal distance from previous prime (6813664063) and next prime (6813664069).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6813664063) 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, 154855980 + ... + 154856023.

It is an arithmetic number, because the mean of its divisors is an integer number (1393704018).

Almost surely, 2^6813664066 is an apocalyptic number.

6813664066 is a deficient number, since it is larger than the sum of its proper divisors (4335968078).

6813664066 is a wasteful number, since it uses less digits than its factorization.

6813664066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309712016.

The product of its (nonzero) digits is 746496, while the sum is 46.

The square root of 6813664066 is about 82544.9215033851. The cubic root of 6813664066 is about 1895.8045994410.

The spelling of 6813664066 in words is "six billion, eight hundred thirteen million, six hundred sixty-four thousand, sixty-six".