8666281 has 4 divisors (see below), whose sum is σ = 9332932. Its totient is φ = 7999632.

The previous prime is 8666269. The next prime is 8666291. The reversal of 8666281 is 1826668.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3671056 + 4995225 = 1916^2 + 2235^2 .

It is a cyclic number.

It is not a de Polignac number, because 8666281 - 2⁷ = 8666153 is a prime.

It is a super-2 number, since 2×8666281² = 150208852741922, which contains 22 as substring.

It is a Duffinian number.

8666281 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8666281.

It is not an unprimeable number, because it can be changed into a prime (8666201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333306 + ... + 333331.

It is an arithmetic number, because the mean of its divisors is an integer number (2333233).

Almost surely, 2^8666281 is an apocalyptic number.

It is an amenable number.

8666281 is a deficient number, since it is larger than the sum of its proper divisors (666651).

8666281 is a wasteful number, since it uses less digits than its factorization.

8666281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666650.

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

The square root of 8666281 is about 2943.8547858208. The cubic root of 8666281 is about 205.4049579944.

The spelling of 8666281 in words is "eight million, six hundred sixty-six thousand, two hundred eighty-one".