666111301065 has 48 divisors (see below), whose sum is σ = 1346464080000. Its totient is φ = 304508016288.

The previous prime is 666111301033. The next prime is 666111301067. The reversal of 666111301065 is 560103111666.

It is not a de Polignac number, because 666111301065 - 2⁵ = 666111301033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (666111301067) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21562515 + ... + 21593384.

It is an arithmetic number, because the mean of its divisors is an integer number (28051335000).

Almost surely, 2^666111301065 is an apocalyptic number.

It is an amenable number.

666111301065 is an abundant number, since it is smaller than the sum of its proper divisors (680352778935).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666111301065 is a wasteful number, since it uses less digits than its factorization.

666111301065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43155931 (or 43155914 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 666111301065 in words is "six hundred sixty-six billion, one hundred eleven million, three hundred one thousand, sixty-five".