8196810866 has 4 divisors (see below), whose sum is σ = 12295216302. Its totient is φ = 4098405432.

The previous prime is 8196810847. The next prime is 8196810893. The reversal of 8196810866 is 6680186918.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6680186918 = 2 ⋅3340093459.

It can be written as a sum of positive squares in only one way, i.e., 8195499841 + 1311025 = 90529^2 + 1145^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2049202715 + ... + 2049202718.

Almost surely, 2^8196810866 is an apocalyptic number.

8196810866 is a deficient number, since it is larger than the sum of its proper divisors (4098405436).

8196810866 is a wasteful number, since it uses less digits than its factorization.

8196810866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4098405435.

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 8196810866 is about 90536.2406221950. The cubic root of 8196810866 is about 2016.2682192328.

The spelling of 8196810866 in words is "eight billion, one hundred ninety-six million, eight hundred ten thousand, eight hundred sixty-six".