38668815663 has 4 divisors (see below), whose sum is σ = 51558420888. Its totient is φ = 25779210440.

The previous prime is 38668815659. The next prime is 38668815667. The reversal of 38668815663 is 36651886683.

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

It is an interprime number because it is at equal distance from previous prime (38668815659) and next prime (38668815667).

It is a cyclic number.

It is not a de Polignac number, because 38668815663 - 2² = 38668815659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38668815597 and 38668815606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38668815667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6444802608 + ... + 6444802613.

It is an arithmetic number, because the mean of its divisors is an integer number (12889605222).

Almost surely, 2^38668815663 is an apocalyptic number.

38668815663 is a deficient number, since it is larger than the sum of its proper divisors (12889605225).

38668815663 is a wasteful number, since it uses less digits than its factorization.

38668815663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12889605224.

The product of its digits is 29859840, while the sum is 60.

The spelling of 38668815663 in words is "thirty-eight billion, six hundred sixty-eight million, eight hundred fifteen thousand, six hundred sixty-three".