66125133611 has 2 divisors, whose sum is σ = 66125133612. Its totient is φ = 66125133610.

The previous prime is 66125133589. The next prime is 66125133671. The reversal of 66125133611 is 11633152166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66125133611 - 2²² = 66120939307 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66125133671) 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, 33062566805 + 33062566806.

It is an arithmetic number, because the mean of its divisors is an integer number (33062566806).

Almost surely, 2^66125133611 is an apocalyptic number.

66125133611 is a deficient number, since it is larger than the sum of its proper divisors (1).

66125133611 is an equidigital number, since it uses as much as digits as its factorization.

66125133611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 35.

Adding to 66125133611 its reverse (11633152166), we get a palindrome (77758285777).

The spelling of 66125133611 in words is "sixty-six billion, one hundred twenty-five million, one hundred thirty-three thousand, six hundred eleven".