66075656027543 has 2 divisors, whose sum is σ = 66075656027544. Its totient is φ = 66075656027542.

The previous prime is 66075656027531. The next prime is 66075656027603. The reversal of 66075656027543 is 34572065657066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66075656027543 - 2⁴ = 66075656027527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66075656627543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33037828013771 + 33037828013772.

It is an arithmetic number, because the mean of its divisors is an integer number (33037828013772).

Almost surely, 2^{66075656027543} is an apocalyptic number.

66075656027543 is a deficient number, since it is larger than the sum of its proper divisors (1).

66075656027543 is an equidigital number, since it uses as much as digits as its factorization.

66075656027543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512000, while the sum is 62.

The spelling of 66075656027543 in words is "sixty-six trillion, seventy-five billion, six hundred fifty-six million, twenty-seven thousand, five hundred forty-three".