65666336685 has 8 divisors (see below), whose sum is σ = 105066138720. Its totient is φ = 35022046224.

The previous prime is 65666336591. The next prime is 65666336717. The reversal of 65666336685 is 58663366656.

65666336685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 65666336685 - 2⁹ = 65666336173 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2188877875 + ... + 2188877904.

It is an arithmetic number, because the mean of its divisors is an integer number (13133267340).

Almost surely, 2^65666336685 is an apocalyptic number.

It is an amenable number.

65666336685 is a deficient number, since it is larger than the sum of its proper divisors (39399802035).

65666336685 is a wasteful number, since it uses less digits than its factorization.

65666336685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377755787.

The product of its digits is 83980800, while the sum is 60.

The spelling of 65666336685 in words is "sixty-five billion, six hundred sixty-six million, three hundred thirty-six thousand, six hundred eighty-five".