8109866 has 4 divisors (see below), whose sum is σ = 12164802. Its totient is φ = 4054932.

The previous prime is 8109859. The next prime is 8109883. The reversal of 8109866 is 6689018.

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., 7590025 + 519841 = 2755^2 + 721^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2027465 + ... + 2027468.

Almost surely, 2^8109866 is an apocalyptic number.

8109866 is a deficient number, since it is larger than the sum of its proper divisors (4054936).

8109866 is a wasteful number, since it uses less digits than its factorization.

8109866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054935.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 8109866 is about 2847.7826462004. The cubic root of 8109866 is about 200.9113905279.

The spelling of 8109866 in words is "eight million, one hundred nine thousand, eight hundred sixty-six".