8153210866 has 4 divisors (see below), whose sum is σ = 12229816302. Its totient is φ = 4076605432.

The previous prime is 8153210833. The next prime is 8153210869. The reversal of 8153210866 is 6680123518.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5583227841 + 2569983025 = 74721^2 + 50695^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (8153210869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2038302715 + ... + 2038302718.

Almost surely, 2^8153210866 is an apocalyptic number.

8153210866 is a deficient number, since it is larger than the sum of its proper divisors (4076605436).

8153210866 is a wasteful number, since it uses less digits than its factorization.

8153210866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4076605435.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 8153210866 is about 90295.1320171802. The cubic root of 8153210866 is about 2012.6869229874.

The spelling of 8153210866 in words is "eight billion, one hundred fifty-three million, two hundred ten thousand, eight hundred sixty-six".