66801111730741 has 2 divisors, whose sum is σ = 66801111730742. Its totient is φ = 66801111730740.

The previous prime is 66801111730733. The next prime is 66801111730783. The reversal of 66801111730741 is 14703711110866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57450487752100 + 9350623978641 = 7579610^2 + 3057879^2 .

It is a cyclic number.

It is not a de Polignac number, because 66801111730741 - 2³ = 66801111730733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66801111730691 and 66801111730700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66801111730721) 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, 33400555865370 + 33400555865371.

It is an arithmetic number, because the mean of its divisors is an integer number (33400555865371).

Almost surely, 2^{66801111730741} is an apocalyptic number.

It is an amenable number.

66801111730741 is a deficient number, since it is larger than the sum of its proper divisors (1).

66801111730741 is an equidigital number, since it uses as much as digits as its factorization.

66801111730741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 46.

The spelling of 66801111730741 in words is "sixty-six trillion, eight hundred one billion, one hundred eleven million, seven hundred thirty thousand, seven hundred forty-one".