677553996861 has 36 divisors (see below), whose sum is σ = 1152191712672. Its totient is φ = 382508948304.

The previous prime is 677553996857. The next prime is 677553996869. The reversal of 677553996861 is 168699355776.

677553996861 is a `hidden beast` number, since 6 + 7 + 7 + 5 + 539 + 9 + 6 + 86 + 1 = 666.

677553996861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 677553996861 - 2² = 677553996857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 677553996861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677553996869) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9218841 + ... + 9292046.

It is an arithmetic number, because the mean of its divisors is an integer number (32005325352).

Almost surely, 2^677553996861 is an apocalyptic number.

It is an amenable number.

677553996861 is a deficient number, since it is larger than the sum of its proper divisors (474637715811).

677553996861 is a wasteful number, since it uses less digits than its factorization.

677553996861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18510990 (or 18510980 counting only the distinct ones).

The product of its digits is 514382400, while the sum is 72.

The spelling of 677553996861 in words is "six hundred seventy-seven billion, five hundred fifty-three million, nine hundred ninety-six thousand, eight hundred sixty-one".