6666305742727 has 2 divisors, whose sum is σ = 6666305742728. Its totient is φ = 6666305742726.

The previous prime is 6666305742721. The next prime is 6666305742731. The reversal of 6666305742727 is 7272475036666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6666305742727 is a prime.

It is a super-2 number, since 2×6666305742727² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666305742721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333152871363 + 3333152871364.

It is an arithmetic number, because the mean of its divisors is an integer number (3333152871364).

Almost surely, 2^{6666305742727} is an apocalyptic number.

6666305742727 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666305742727 is an equidigital number, since it uses as much as digits as its factorization.

6666305742727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 106686720, while the sum is 61.

The spelling of 6666305742727 in words is "six trillion, six hundred sixty-six billion, three hundred five million, seven hundred forty-two thousand, seven hundred twenty-seven".