138316794666 has 64 divisors (see below), whose sum is σ = 288176458752. Its totient is φ = 44210880000.

The previous prime is 138316794661. The next prime is 138316794667. The reversal of 138316794666 is 666497613831.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138316794661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9452836 + ... + 9467456.

It is an arithmetic number, because the mean of its divisors is an integer number (4502757168).

Almost surely, 2^138316794666 is an apocalyptic number.

138316794666 is an abundant number, since it is smaller than the sum of its proper divisors (149859664086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138316794666 is a wasteful number, since it uses less digits than its factorization.

138316794666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15119.

The product of its digits is 23514624, while the sum is 60.

The spelling of 138316794666 in words is "one hundred thirty-eight billion, three hundred sixteen million, seven hundred ninety-four thousand, six hundred sixty-six".