6666995168459 has 16 divisors (see below), whose sum is σ = 6960510485280. Its totient is φ = 6380320826880.

The previous prime is 6666995168437. The next prime is 6666995168461. The reversal of 6666995168459 is 9548615996666.

It is a cyclic number.

It is not a de Polignac number, because 6666995168459 - 2⁴⁰ = 5567483540683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6666995168429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5538524 + ... + 6633945.

It is an arithmetic number, because the mean of its divisors is an integer number (435031905330).

Almost surely, 2^{6666995168459} is an apocalyptic number.

6666995168459 is a deficient number, since it is larger than the sum of its proper divisors (293515316821).

6666995168459 is a wasteful number, since it uses less digits than its factorization.

6666995168459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12172750.

The product of its digits is 4534963200, while the sum is 80.

The spelling of 6666995168459 in words is "six trillion, six hundred sixty-six billion, nine hundred ninety-five million, one hundred sixty-eight thousand, four hundred fifty-nine".