8664832861 has 2 divisors, whose sum is σ = 8664832862. Its totient is φ = 8664832860.

The previous prime is 8664832843. The next prime is 8664832877. The reversal of 8664832861 is 1682384668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7209028836 + 1455804025 = 84906^2 + 38155^2 .

It is a cyclic number.

It is not a de Polignac number, because 8664832861 - 2⁹ = 8664832349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8664832799 and 8664832808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8664839861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4332416430 + 4332416431.

It is an arithmetic number, because the mean of its divisors is an integer number (4332416431).

Almost surely, 2^8664832861 is an apocalyptic number.

It is an amenable number.

8664832861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8664832861 is an equidigital number, since it uses as much as digits as its factorization.

8664832861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2654208, while the sum is 52.

The square root of 8664832861 is about 93085.0839877152. The cubic root of 8664832861 is about 2053.9351627366.

The spelling of 8664832861 in words is "eight billion, six hundred sixty-four million, eight hundred thirty-two thousand, eight hundred sixty-one".