666015161065 has 4 divisors (see below), whose sum is σ = 799218193284. Its totient is φ = 532812128848.

The previous prime is 666015161059. The next prime is 666015161093. The reversal of 666015161065 is 560161510666.

666015161065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71000398681 + 595014762384 = 266459^2 + 771372^2 .

It is a cyclic number.

It is not a de Polignac number, because 666015161065 - 2⁵ = 666015161033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66601516102 + ... + 66601516111.

It is an arithmetic number, because the mean of its divisors is an integer number (199804548321).

Almost surely, 2^666015161065 is an apocalyptic number.

It is an amenable number.

666015161065 is a deficient number, since it is larger than the sum of its proper divisors (133203032219).

666015161065 is a wasteful number, since it uses less digits than its factorization.

666015161065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133203032218.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 666015161065 in words is "six hundred sixty-six billion, fifteen million, one hundred sixty-one thousand, sixty-five".