6666995168429 has 2 divisors, whose sum is σ = 6666995168430. Its totient is φ = 6666995168428.

The previous prime is 6666995168417. The next prime is 6666995168437. The reversal of 6666995168429 is 9248615996666.

6666995168429 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4776650658025 + 1890344510404 = 2185555^2 + 1374898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6666995168429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6666995168429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666995168129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333497584214 + 3333497584215.

It is an arithmetic number, because the mean of its divisors is an integer number (3333497584215).

Almost surely, 2^{6666995168429} is an apocalyptic number.

It is an amenable number.

6666995168429 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666995168429 is an equidigital number, since it uses as much as digits as its factorization.

6666995168429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1813985280, while the sum is 77.

The spelling of 6666995168429 in words is "six trillion, six hundred sixty-six billion, nine hundred ninety-five million, one hundred sixty-eight thousand, four hundred twenty-nine".