866335138 has 8 divisors (see below), whose sum is σ = 1324021788. Its totient is φ = 424994544.

The previous prime is 866335117. The next prime is 866335139. The reversal of 866335138 is 831533668.

866335138 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 862185769 + 4149369 = 29363^2 + 2037^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 866335094 and 866335103.

It is not an unprimeable number, because it can be changed into a prime (866335139) 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, 4086381 + ... + 4086592.

Almost surely, 2^866335138 is an apocalyptic number.

866335138 is a deficient number, since it is larger than the sum of its proper divisors (457686650).

866335138 is a wasteful number, since it uses less digits than its factorization.

866335138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8173028.

The product of its digits is 311040, while the sum is 43.

The square root of 866335138 is about 29433.5716147395. The cubic root of 866335138 is about 953.2979149908.

The spelling of 866335138 in words is "eight hundred sixty-six million, three hundred thirty-five thousand, one hundred thirty-eight".