66660046200061 has 2 divisors, whose sum is σ = 66660046200062. Its totient is φ = 66660046200060.

The previous prime is 66660046200043. The next prime is 66660046200089. The reversal of 66660046200061 is 16000264006666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33705339696900 + 32954706503161 = 5805630^2 + 5740619^2 .

It is a cyclic number.

It is not a de Polignac number, because 66660046200061 - 2²⁷ = 66659911982333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66660046199990 and 66660046200017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66660046200361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33330023100030 + 33330023100031.

It is an arithmetic number, because the mean of its divisors is an integer number (33330023100031).

Almost surely, 2^{66660046200061} is an apocalyptic number.

It is an amenable number.

66660046200061 is a deficient number, since it is larger than the sum of its proper divisors (1).

66660046200061 is an equidigital number, since it uses as much as digits as its factorization.

66660046200061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 66660046200061 in words is "sixty-six trillion, six hundred sixty billion, forty-six million, two hundred thousand, sixty-one".