8318666668138 has 4 divisors (see below), whose sum is σ = 12478000002210. Its totient is φ = 4159333334068.

The previous prime is 8318666668133. The next prime is 8318666668183.

8318666668138 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in only one way, i.e., 7612870094449 + 705796573689 = 2759143^2 + 840117^2 .

It is not an unprimeable number, because it can be changed into a prime (8318666668133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2079666667033 + ... + 2079666667036.

Almost surely, 2^{8318666668138} is an apocalyptic number.

8318666668138 is a deficient number, since it is larger than the sum of its proper divisors (4159333334072).

8318666668138 is a wasteful number, since it uses less digits than its factorization.

8318666668138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159333334071.

The product of its digits is 286654464, while the sum is 70.

The spelling of 8318666668138 in words is "eight trillion, three hundred eighteen billion, six hundred sixty-six million, six hundred sixty-eight thousand, one hundred thirty-eight".