38926666662991 has 2 divisors, whose sum is σ = 38926666662992. Its totient is φ = 38926666662990.

The previous prime is 38926666662977. The next prime is 38926666663081. The reversal of 38926666662991 is 19926666662983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38926666662991 - 2¹¹ = 38926666660943 is a prime.

It is a super-3 number, since 3×38926666662991³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38926666662791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19463333331495 + 19463333331496.

It is an arithmetic number, because the mean of its divisors is an integer number (19463333331496).

Almost surely, 2^{38926666662991} is an apocalyptic number.

38926666662991 is a deficient number, since it is larger than the sum of its proper divisors (1).

38926666662991 is an equidigital number, since it uses as much as digits as its factorization.

38926666662991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265173504, while the sum is 79.

The spelling of 38926666662991 in words is "thirty-eight trillion, nine hundred twenty-six billion, six hundred sixty-six million, six hundred sixty-two thousand, nine hundred ninety-one".