8318666668139 has 64 divisors (see below), whose sum is σ = 9404363243520. Its totient is φ = 7324950528000.

The previous prime is 8318666668133. The next prime is 8318666668183. The reversal of 8318666668139 is 9318666668138.

It is a de Polignac number, because none of the positive numbers 2^k-8318666668139 is a prime.

It is a Duffinian number.

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 in 63 ways as a sum of consecutive naturals, for example, 447399227 + ... + 447417819.

It is an arithmetic number, because the mean of its divisors is an integer number (146943175680).

Almost surely, 2^{8318666668139} is an apocalyptic number.

8318666668139 is a deficient number, since it is larger than the sum of its proper divisors (1085696575381).

8318666668139 is a wasteful number, since it uses less digits than its factorization.

8318666668139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18972.

The product of its digits is 322486272, while the sum is 71.

Subtracting 8318666668139 from its reverse (9318666668138), we obtain a palindrome (999999999999).

The spelling of 8318666668139 in words is "eight trillion, three hundred eighteen billion, six hundred sixty-six million, six hundred sixty-eight thousand, one hundred thirty-nine".