766408616813 has 16 divisors (see below), whose sum is σ = 897322629504. Its totient is φ = 640853648640.

The previous prime is 766408616807. The next prime is 766408616881. The reversal of 766408616813 is 318616804667.

It is a cyclic number.

It is not a de Polignac number, because 766408616813 - 2⁶ = 766408616749 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766408616513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4305881 + ... + 4480337.

It is an arithmetic number, because the mean of its divisors is an integer number (56082664344).

Almost surely, 2^766408616813 is an apocalyptic number.

It is an amenable number.

766408616813 is a deficient number, since it is larger than the sum of its proper divisors (130914012691).

766408616813 is a wasteful number, since it uses less digits than its factorization.

766408616813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189812.

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 766408616813 in words is "seven hundred sixty-six billion, four hundred eight million, six hundred sixteen thousand, eight hundred thirteen".