66006025541161 has 2 divisors, whose sum is σ = 66006025541162. Its totient is φ = 66006025541160.

The previous prime is 66006025541153. The next prime is 66006025541231. The reversal of 66006025541161 is 16114552060066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65446886505625 + 559139035536 = 8089925^2 + 747756^2 .

It is a cyclic number.

It is not a de Polignac number, because 66006025541161 - 2³ = 66006025541153 is a prime.

It is not a weakly prime, because it can be changed into another prime (66006025541761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33003012770580 + 33003012770581.

It is an arithmetic number, because the mean of its divisors is an integer number (33003012770581).

Almost surely, 2^{66006025541161} is an apocalyptic number.

It is an amenable number.

66006025541161 is a deficient number, since it is larger than the sum of its proper divisors (1).

66006025541161 is an equidigital number, since it uses as much as digits as its factorization.

66006025541161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 66006025541161 in words is "sixty-six trillion, six billion, twenty-five million, five hundred forty-one thousand, one hundred sixty-one".