8643186666641 has 4 divisors (see below), whose sum is σ = 8647866249792. Its totient is φ = 8638507083492.

The previous prime is 8643186666607. The next prime is 8643186666703. The reversal of 8643186666641 is 1466666813468.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8643186666641 - 2³⁸ = 8368308759697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8643186666601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2339788805 + ... + 2339792498.

It is an arithmetic number, because the mean of its divisors is an integer number (2161966562448).

Almost surely, 2^{8643186666641} is an apocalyptic number.

It is an amenable number.

8643186666641 is a deficient number, since it is larger than the sum of its proper divisors (4679583151).

8643186666641 is a wasteful number, since it uses less digits than its factorization.

8643186666641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4679583150.

The product of its digits is 143327232, while the sum is 65.

The spelling of 8643186666641 in words is "eight trillion, six hundred forty-three billion, one hundred eighty-six million, six hundred sixty-six thousand, six hundred forty-one".