66533710636061 has 2 divisors, whose sum is σ = 66533710636062. Its totient is φ = 66533710636060.

The previous prime is 66533710636033. The next prime is 66533710636091. The reversal of 66533710636061 is 16063601733566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37164020212900 + 29369690423161 = 6096230^2 + 5419381^2 .

It is a cyclic number.

It is not a de Polignac number, because 66533710636061 - 2¹⁰ = 66533710635037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66533710635994 and 66533710636012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66533710636091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33266855318030 + 33266855318031.

It is an arithmetic number, because the mean of its divisors is an integer number (33266855318031).

Almost surely, 2^{66533710636061} is an apocalyptic number.

It is an amenable number.

66533710636061 is a deficient number, since it is larger than the sum of its proper divisors (1).

66533710636061 is an equidigital number, since it uses as much as digits as its factorization.

66533710636061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7348320, while the sum is 53.

The spelling of 66533710636061 in words is "sixty-six trillion, five hundred thirty-three billion, seven hundred ten million, six hundred thirty-six thousand, sixty-one".