677781898866 has 48 divisors (see below), whose sum is σ = 1504448225280. Its totient is φ = 220401781440.

The previous prime is 677781898831. The next prime is 677781898877. The reversal of 677781898866 is 668898187776.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16982851 + ... + 17022713.

It is an arithmetic number, because the mean of its divisors is an integer number (31342671360).

Almost surely, 2^677781898866 is an apocalyptic number.

677781898866 is an abundant number, since it is smaller than the sum of its proper divisors (826666326414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

677781898866 is a wasteful number, since it uses less digits than its factorization.

677781898866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62951 (or 62948 counting only the distinct ones).

The product of its digits is 2731180032, while the sum is 81.

The spelling of 677781898866 in words is "six hundred seventy-seven billion, seven hundred eighty-one million, eight hundred ninety-eight thousand, eight hundred sixty-six".