6543166927679 has 4 divisors (see below), whose sum is σ = 6543172065360. Its totient is φ = 6543161790000.

The previous prime is 6543166927637. The next prime is 6543166927709. The reversal of 6543166927679 is 9767296613456.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6543166927679 - 2²⁴ = 6543150150463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543166927279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930179 + ... + 3735179.

It is an arithmetic number, because the mean of its divisors is an integer number (1635793016340).

Almost surely, 2^{6543166927679} is an apocalyptic number.

6543166927679 is a deficient number, since it is larger than the sum of its proper divisors (5137681).

6543166927679 is a wasteful number, since it uses less digits than its factorization.

6543166927679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5137680.

The product of its digits is 617258880, while the sum is 71.

The spelling of 6543166927679 in words is "six trillion, five hundred forty-three billion, one hundred sixty-six million, nine hundred twenty-seven thousand, six hundred seventy-nine".