61066561165065 has 16 divisors (see below), whose sum is σ = 108562775404800. Its totient is φ = 32568832621296.

The previous prime is 61066561165063. The next prime is 61066561165157. The reversal of 61066561165065 is 56056116566016.

61066561165065 is a `hidden beast` number, since 6 + 1 + 0 + 6 + 6 + 561 + 16 + 5 + 0 + 65 = 666.

It is not a de Polignac number, because 61066561165065 - 2¹ = 61066561165063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61066561165063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226172448625 + ... + 226172448894.

It is an arithmetic number, because the mean of its divisors is an integer number (6785173462800).

Almost surely, 2^{61066561165065} is an apocalyptic number.

It is an amenable number.

61066561165065 is a deficient number, since it is larger than the sum of its proper divisors (47496214239735).

61066561165065 is a wasteful number, since it uses less digits than its factorization.

61066561165065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452344897533 (or 452344897527 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 61066561165065 in words is "sixty-one trillion, sixty-six billion, five hundred sixty-one million, one hundred sixty-five thousand, sixty-five".