8661966075 has 72 divisors (see below), whose sum is σ = 17802360576. Its totient is φ = 3943800000.

The previous prime is 8661966041. The next prime is 8661966077. The reversal of 8661966075 is 5706691668.

It is not a de Polignac number, because 8661966075 - 2⁹ = 8661965563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8661966077) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 384370 + ... + 406280.

It is an arithmetic number, because the mean of its divisors is an integer number (247255008).

Almost surely, 2^8661966075 is an apocalyptic number.

8661966075 is an abundant number, since it is smaller than the sum of its proper divisors (9140394501).

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

8661966075 is a wasteful number, since it uses less digits than its factorization.

8661966075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22185 (or 22177 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 8661966075 is about 93069.6839738913. The cubic root of 8661966075 is about 2053.7086208764.

The spelling of 8661966075 in words is "eight billion, six hundred sixty-one million, nine hundred sixty-six thousand, seventy-five".