766889064891 has 12 divisors (see below), whose sum is σ = 1107797141568. Its totient is φ = 511227764784.

The previous prime is 766889064889. The next prime is 766889064901. The reversal of 766889064891 is 198460988667.

766889064891 is a `hidden beast` number, since 7 + 6 + 68 + 89 + 0 + 6 + 489 + 1 = 666.

It is not a de Polignac number, because 766889064891 - 2¹ = 766889064889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (766889054891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2480200 + ... + 2772213.

It is an arithmetic number, because the mean of its divisors is an integer number (92316428464).

Almost surely, 2^766889064891 is an apocalyptic number.

766889064891 is a deficient number, since it is larger than the sum of its proper divisors (340908076677).

766889064891 is a wasteful number, since it uses less digits than its factorization.

766889064891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5268642 (or 5268639 counting only the distinct ones).

The product of its (nonzero) digits is 250822656, while the sum is 72.

The spelling of 766889064891 in words is "seven hundred sixty-six billion, eight hundred eighty-nine million, sixty-four thousand, eight hundred ninety-one".