66115861741 has 2 divisors, whose sum is σ = 66115861742. Its totient is φ = 66115861740.

The previous prime is 66115861727. The next prime is 66115861753. The reversal of 66115861741 is 14716851166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65550848841 + 565012900 = 256029^2 + 23770^2 .

It is a cyclic number.

It is not a de Polignac number, because 66115861741 - 2²¹ = 66113764589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66115861691 and 66115861700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66115861711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33057930870 + 33057930871.

It is an arithmetic number, because the mean of its divisors is an integer number (33057930871).

Almost surely, 2^66115861741 is an apocalyptic number.

It is an amenable number.

66115861741 is a deficient number, since it is larger than the sum of its proper divisors (1).

66115861741 is an equidigital number, since it uses as much as digits as its factorization.

66115861741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The spelling of 66115861741 in words is "sixty-six billion, one hundred fifteen million, eight hundred sixty-one thousand, seven hundred forty-one".