8166281 has 4 divisors (see below), whose sum is σ = 8181012. Its totient is φ = 8151552.

The previous prime is 8166271. The next prime is 8166283. The reversal of 8166281 is 1826618.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1826618 = 2 ⋅913309.

It can be written as a sum of positive squares in 2 ways, for example, as 6330256 + 1836025 = 2516^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 8166281 - 2⁶ = 8166217 is a prime.

It is a super-2 number, since 2×8166281² = 133376290741922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8166283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6500 + ... + 7653.

It is an arithmetic number, because the mean of its divisors is an integer number (2045253).

Almost surely, 2^8166281 is an apocalyptic number.

It is an amenable number.

8166281 is a deficient number, since it is larger than the sum of its proper divisors (14731).

8166281 is a wasteful number, since it uses less digits than its factorization.

8166281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14730.

The product of its digits is 4608, while the sum is 32.

The square root of 8166281 is about 2857.6705548401. The cubic root of 8166281 is about 201.3761838704.

The spelling of 8166281 in words is "eight million, one hundred sixty-six thousand, two hundred eighty-one".