8666842 has 8 divisors (see below), whose sum is σ = 13054932. Its totient is φ = 4315200.

The previous prime is 8666839. The next prime is 8666849. The reversal of 8666842 is 2486668.

8666842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6765201 + 1901641 = 2601^2 + 1379^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×8666842² = 150228300505928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8666795 and 8666804.

It is not an unprimeable number, because it can be changed into a prime (8666849) 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, 8509 + ... + 9472.

Almost surely, 2^8666842 is an apocalyptic number.

8666842 is a deficient number, since it is larger than the sum of its proper divisors (4388090).

8666842 is a wasteful number, since it uses less digits than its factorization.

8666842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18224.

The product of its digits is 110592, while the sum is 40.

The square root of 8666842 is about 2943.9500675113. The cubic root of 8666842 is about 205.4093901029.

The spelling of 8666842 in words is "eight million, six hundred sixty-six thousand, eight hundred forty-two".