66450161265 has 16 divisors (see below), whose sum is σ = 106359000000. Its totient is φ = 35427172032.

The previous prime is 66450161207. The next prime is 66450161269. The reversal of 66450161265 is 56216105466.

It is not a de Polignac number, because 66450161265 - 2⁸ = 66450161009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66450161269) 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, 764515 + ... + 846984.

It is an arithmetic number, because the mean of its divisors is an integer number (6647437500).

Almost surely, 2^66450161265 is an apocalyptic number.

It is an amenable number.

66450161265 is a deficient number, since it is larger than the sum of its proper divisors (39908838735).

66450161265 is a wasteful number, since it uses less digits than its factorization.

66450161265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614256.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 66450161265 in words is "sixty-six billion, four hundred fifty million, one hundred sixty-one thousand, two hundred sixty-five".