66115861753 has 2 divisors, whose sum is σ = 66115861754. Its totient is φ = 66115861752.

The previous prime is 66115861741. The next prime is 66115861759. The reversal of 66115861753 is 35716851166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61609693369 + 4506168384 = 248213^2 + 67128^2 .

It is a cyclic number.

It is not a de Polignac number, because 66115861753 - 2⁹ = 66115861241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66115861697 and 66115861706.

It is not a weakly prime, because it can be changed into another prime (66115861759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33057930876 + 33057930877.

It is an arithmetic number, because the mean of its divisors is an integer number (33057930877).

Almost surely, 2^66115861753 is an apocalyptic number.

It is an amenable number.

66115861753 is a deficient number, since it is larger than the sum of its proper divisors (1).

66115861753 is an equidigital number, since it uses as much as digits as its factorization.

66115861753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 49.

The spelling of 66115861753 in words is "sixty-six billion, one hundred fifteen million, eight hundred sixty-one thousand, seven hundred fifty-three".