678568585865877 has 96 divisors (see below), whose sum is σ = 1206457888296960. Its totient is φ = 358674016135680.

The previous prime is 678568585865873. The next prime is 678568585865909. The reversal of 678568585865877 is 778568585865876.

678568585865877 is a `hidden beast` number, since 6 + 7 + 8 + 5 + 6 + 8 + 5 + 8 + 5 + 8 + 6 + 587 + 7 = 666.

It is not a de Polignac number, because 678568585865877 - 2² = 678568585865873 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678568585865873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 266083608 + ... + 268621710.

It is an arithmetic number, because the mean of its divisors is an integer number (12567269669760).

Almost surely, 2^{678568585865877} is an apocalyptic number.

It is an amenable number.

678568585865877 is a deficient number, since it is larger than the sum of its proper divisors (527889302431083).

678568585865877 is a wasteful number, since it uses less digits than its factorization.

678568585865877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2542423 (or 2542420 counting only the distinct ones).

The product of its digits is 1517322240000, while the sum is 99.

Subtracting 678568585865877 from its reverse (778568585865876), we obtain a palindrome (99999999999999).

The spelling of 678568585865877 in words is "six hundred seventy-eight trillion, five hundred sixty-eight billion, five hundred eighty-five million, eight hundred sixty-five thousand, eight hundred seventy-seven".