108420666687 has 24 divisors (see below), whose sum is σ = 157885556400. Its totient is φ = 71691210240.

The previous prime is 108420666671. The next prime is 108420666707. The reversal of 108420666687 is 786666024801.

It is not a de Polignac number, because 108420666687 - 2⁴ = 108420666671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108420666617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2331439 + ... + 2377487.

It is an arithmetic number, because the mean of its divisors is an integer number (6578564850).

Almost surely, 2^108420666687 is an apocalyptic number.

108420666687 is a deficient number, since it is larger than the sum of its proper divisors (49464889713).

108420666687 is a wasteful number, since it uses less digits than its factorization.

108420666687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48183 (or 48180 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 108420666687 in words is "one hundred eight billion, four hundred twenty million, six hundred sixty-six thousand, six hundred eighty-seven".