8261866 has 4 divisors (see below), whose sum is σ = 12392802. Its totient is φ = 4130932.

The previous prime is 8261857. The next prime is 8261879. The reversal of 8261866 is 6681628.

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., 6890625 + 1371241 = 2625^2 + 1171^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2065465 + ... + 2065468.

Almost surely, 2^8261866 is an apocalyptic number.

8261866 is a deficient number, since it is larger than the sum of its proper divisors (4130936).

8261866 is a wasteful number, since it uses less digits than its factorization.

8261866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4130935.

The product of its digits is 27648, while the sum is 37.

The square root of 8261866 is about 2874.3461865266. The cubic root of 8261866 is about 202.1588300856.

The spelling of 8261866 in words is "eight million, two hundred sixty-one thousand, eight hundred sixty-six".