108420666689 has 4 divisors (see below), whose sum is σ = 108444442500. Its totient is φ = 108396890880.

The previous prime is 108420666671. The next prime is 108420666707. The reversal of 108420666689 is 986666024801.

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 (108420666671) and next prime (108420666707).

It can be written as a sum of positive squares in 2 ways, for example, as 32321927089 + 76098739600 = 179783^2 + 275860^2 .

It is a cyclic number.

It is not a de Polignac number, because 108420666689 - 2¹⁶ = 108420601153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108420666659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11881064 + ... + 11890185.

It is an arithmetic number, because the mean of its divisors is an integer number (27111110625).

Almost surely, 2^108420666689 is an apocalyptic number.

It is an amenable number.

108420666689 is a deficient number, since it is larger than the sum of its proper divisors (23775811).

108420666689 is an equidigital number, since it uses as much as digits as its factorization.

108420666689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23775810.

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 108420666689 in words is "one hundred eight billion, four hundred twenty million, six hundred sixty-six thousand, six hundred eighty-nine".