6634668640727 has 2 divisors, whose sum is σ = 6634668640728. Its totient is φ = 6634668640726.

The previous prime is 6634668640667. The next prime is 6634668640751. The reversal of 6634668640727 is 7270468664366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6634668640727 - 2⁸ = 6634668640471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6634668640027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3317334320363 + 3317334320364.

It is an arithmetic number, because the mean of its divisors is an integer number (3317334320364).

Almost surely, 2^{6634668640727} is an apocalyptic number.

6634668640727 is a deficient number, since it is larger than the sum of its proper divisors (1).

6634668640727 is an equidigital number, since it uses as much as digits as its factorization.

6634668640727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 292626432, while the sum is 65.

The spelling of 6634668640727 in words is "six trillion, six hundred thirty-four billion, six hundred sixty-eight million, six hundred forty thousand, seven hundred twenty-seven".