6886658138 has 8 divisors (see below), whose sum is σ = 10524892788. Its totient is φ = 3378360544.

The previous prime is 6886658113. The next prime is 6886658143. The reversal of 6886658138 is 8318566886.

It can be written as a sum of positive squares in 2 ways, for example, as 6859649329 + 27008809 = 82823^2 + 5197^2 .

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

It is a super-3 number, since 3×6886658138³ (a number of 30 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32484131 + ... + 32484342.

Almost surely, 2^6886658138 is an apocalyptic number.

6886658138 is a deficient number, since it is larger than the sum of its proper divisors (3638234650).

6886658138 is a wasteful number, since it uses less digits than its factorization.

6886658138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64968528.

The product of its digits is 13271040, while the sum is 59.

The square root of 6886658138 is about 82985.8911984441. The cubic root of 6886658138 is about 1902.5504196639.

The spelling of 6886658138 in words is "six billion, eight hundred eighty-six million, six hundred fifty-eight thousand, one hundred thirty-eight".