766880264089 has 3 divisors (see below), whose sum is σ = 766881139807. Its totient is φ = 766879388372.

The previous prime is 766880264083. The next prime is 766880264099. The reversal of 766880264089 is 980462088667.

The square root of 766880264089 is 875717.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 614852015625 + 152028248464 = 784125^2 + 389908^2 .

It is not a de Polignac number, because 766880264089 - 2¹⁵ = 766880231321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 766880264089.

It is not an unprimeable number, because it can be changed into a prime (766880264083) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 437859 + ... + 1313575.

Almost surely, 2^766880264089 is an apocalyptic number.

766880264089 is the 875717-th square number.

766880264089 is the 437859-th centered octagonal number.

It is an amenable number.

766880264089 is a deficient number, since it is larger than the sum of its proper divisors (875718).

766880264089 is an frugal number, since it uses more digits than its factorization.

766880264089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751434 (or 875717 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 64.

Multiplying 766880264089 by its sum of digits (64), we get a square (49080336901696 = 7005736²).

The spelling of 766880264089 in words is "seven hundred sixty-six billion, eight hundred eighty million, two hundred sixty-four thousand, eighty-nine".