66757766143 has 2 divisors, whose sum is σ = 66757766144. Its totient is φ = 66757766142.

The previous prime is 66757766069. The next prime is 66757766177. The reversal of 66757766143 is 34166775766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66757766143 - 2²⁵ = 66724211711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66757766743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33378883071 + 33378883072.

It is an arithmetic number, because the mean of its divisors is an integer number (33378883072).

Almost surely, 2^66757766143 is an apocalyptic number.

66757766143 is a deficient number, since it is larger than the sum of its proper divisors (1).

66757766143 is an equidigital number, since it uses as much as digits as its factorization.

66757766143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26671680, while the sum is 58.

The spelling of 66757766143 in words is "sixty-six billion, seven hundred fifty-seven million, seven hundred sixty-six thousand, one hundred forty-three".