680845828977 has 12 divisors (see below), whose sum is σ = 1010023542580. Its totient is φ = 441629726688.

The previous prime is 680845828973. The next prime is 680845828997. The reversal of 680845828977 is 779828548086.

680845828977 is a `hidden beast` number, since 6 + 80 + 8 + 458 + 2 + 8 + 97 + 7 = 666.

680845828977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 256720568976 + 424125260001 = 506676^2 + 651249^2 .

It is not a de Polignac number, because 680845828977 - 2² = 680845828973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680845828973) 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, 1022290702 + ... + 1022291367.

Almost surely, 2^680845828977 is an apocalyptic number.

It is an amenable number.

680845828977 is a deficient number, since it is larger than the sum of its proper divisors (329177713603).

680845828977 is a wasteful number, since it uses less digits than its factorization.

680845828977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044582112 (or 2044582109 counting only the distinct ones).

The product of its (nonzero) digits is 433520640, while the sum is 72.

The spelling of 680845828977 in words is "six hundred eighty billion, eight hundred forty-five million, eight hundred twenty-eight thousand, nine hundred seventy-seven".