677778613076668 has 24 divisors (see below), whose sum is σ = 1218406070910672. Its totient is φ = 329666147725824.

The previous prime is 677778613076651. The next prime is 677778613076687. The reversal of 677778613076668 is 866670316877776.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 443598430 + ... + 445123717.

It is an arithmetic number, because the mean of its divisors is an integer number (50766919621278).

Almost surely, 2^{677778613076668} is an apocalyptic number.

It is an amenable number.

677778613076668 is a deficient number, since it is larger than the sum of its proper divisors (540627457834004).

677778613076668 is a wasteful number, since it uses less digits than its factorization.

677778613076668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888727341 (or 888727339 counting only the distinct ones).

The product of its (nonzero) digits is 25092716544, while the sum is 85.

The spelling of 677778613076668 in words is "six hundred seventy-seven trillion, seven hundred seventy-eight billion, six hundred thirteen million, seventy-six thousand, six hundred sixty-eight".