108006660505 has 4 divisors (see below), whose sum is σ = 129607992612. Its totient is φ = 86405328400.

The previous prime is 108006660479. The next prime is 108006660511. The reversal of 108006660505 is 505066600801.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60757813081 + 47248847424 = 246491^2 + 217368^2 .

It is a de Polignac number, because none of the positive numbers 2^k-108006660505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10800666046 + ... + 10800666055.

It is an arithmetic number, because the mean of its divisors is an integer number (32401998153).

Almost surely, 2^108006660505 is an apocalyptic number.

It is an amenable number.

108006660505 is a deficient number, since it is larger than the sum of its proper divisors (21601332107).

108006660505 is an equidigital number, since it uses as much as digits as its factorization.

108006660505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21601332106.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 108006660505 in words is "one hundred eight billion, six million, six hundred sixty thousand, five hundred five".