766206985556 has 12 divisors (see below), whose sum is σ = 1340869883892. Its totient is φ = 383101304448.

The previous prime is 766206985487. The next prime is 766206985693. The reversal of 766206985556 is 655589602667.

It can be written as a sum of positive squares in 2 ways, for example, as 101111280400 + 665095705156 = 317980^2 + 815534^2 .

It is a junction number, because it is equal to n+sod(n) for n = 766206985492 and 766206985501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437666 + ... + 1312998.

It is an arithmetic number, because the mean of its divisors is an integer number (111739156991).

Almost surely, 2^766206985556 is an apocalyptic number.

It is a pronic number, being equal to 875332×875333.

It is an amenable number.

766206985556 is a deficient number, since it is larger than the sum of its proper divisors (574662898336).

766206985556 is a wasteful number, since it uses less digits than its factorization.

766206985556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094170 (or 1094168 counting only the distinct ones).

The product of its (nonzero) digits is 163296000, while the sum is 65.

The spelling of 766206985556 in words is "seven hundred sixty-six billion, two hundred six million, nine hundred eighty-five thousand, five hundred fifty-six".