6681125785665 has 8 divisors (see below), whose sum is σ = 10689801257088. Its totient is φ = 3563267085680.

The previous prime is 6681125785583. The next prime is 6681125785673. The reversal of 6681125785665 is 5665875211866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6681125785665 - 2¹⁸ = 6681125523521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6681125785596 and 6681125785605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222704192841 + ... + 222704192870.

It is an arithmetic number, because the mean of its divisors is an integer number (1336225157136).

Almost surely, 2^{6681125785665} is an apocalyptic number.

It is an amenable number.

6681125785665 is a deficient number, since it is larger than the sum of its proper divisors (4008675471423).

6681125785665 is a wasteful number, since it uses less digits than its factorization.

6681125785665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445408385719.

The product of its digits is 145152000, while the sum is 66.

The spelling of 6681125785665 in words is "six trillion, six hundred eighty-one billion, one hundred twenty-five million, seven hundred eighty-five thousand, six hundred sixty-five".