6666666706667 has 8 divisors (see below), whose sum is σ = 7272873304320. Its totient is φ = 6060484440360.

The previous prime is 6666666706529. The next prime is 6666666706697. The reversal of 6666666706667 is 7666076666666.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6666666706667 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6666666706594 and 6666666706603.

It is not an unprimeable number, because it can be changed into a prime (6666666706697) 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, 5507567 + ... + 6608072.

It is an arithmetic number, because the mean of its divisors is an integer number (909109163040).

Almost surely, 2^{6666666706667} is an apocalyptic number.

6666666706667 is a deficient number, since it is larger than the sum of its proper divisors (606206597653).

6666666706667 is a wasteful number, since it uses less digits than its factorization.

6666666706667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12165673.

The product of its (nonzero) digits is 2962842624, while the sum is 74.

The spelling of 6666666706667 in words is "six trillion, six hundred sixty-six billion, six hundred sixty-six million, seven hundred six thousand, six hundred sixty-seven".