6666645861119 has 16 divisors (see below), whose sum is σ = 6822831375360. Its totient is φ = 6512697354240.

The previous prime is 6666645861101. The next prime is 6666645861137. The reversal of 6666645861119 is 9111685466666.

It is an interprime number because it is at equal distance from previous prime (6666645861101) and next prime (6666645861137).

It is a cyclic number.

It is not a de Polignac number, because 6666645861119 - 2²⁰ = 6666644812543 is a prime.

It is a super-2 number, since 2×6666645861119² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666645861619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1500347 + ... + 3947699.

It is an arithmetic number, because the mean of its divisors is an integer number (426426960960).

Almost surely, 2^{6666645861119} is an apocalyptic number.

6666645861119 is a deficient number, since it is larger than the sum of its proper divisors (156185514241).

6666645861119 is a wasteful number, since it uses less digits than its factorization.

6666645861119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447810.

The product of its digits is 67184640, while the sum is 65.

The spelling of 6666645861119 in words is "six trillion, six hundred sixty-six billion, six hundred forty-five million, eight hundred sixty-one thousand, one hundred nineteen".