6666736704007 has 4 divisors (see below), whose sum is σ = 6666958522440. Its totient is φ = 6666514885576.

The previous prime is 6666736703981. The next prime is 6666736704077. The reversal of 6666736704007 is 7004076376666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6666736704007 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666736704077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110864128 + ... + 110924245.

It is an arithmetic number, because the mean of its divisors is an integer number (1666739630610).

Almost surely, 2^{6666736704007} is an apocalyptic number.

6666736704007 is a deficient number, since it is larger than the sum of its proper divisors (221818433).

6666736704007 is a wasteful number, since it uses less digits than its factorization.

6666736704007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221818432.

The product of its (nonzero) digits is 32006016, while the sum is 58.

The spelling of 6666736704007 in words is "six trillion, six hundred sixty-six billion, seven hundred thirty-six million, seven hundred four thousand, seven".