677681856 has 56 divisors (see below), whose sum is σ = 1992264240. Its totient is φ = 225893376.

The previous prime is 677681839. The next prime is 677681869. The reversal of 677681856 is 658186776.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194361 + ... + 197816.

Almost surely, 2^677681856 is an apocalyptic number.

It is an amenable number.

677681856 is an abundant number, since it is smaller than the sum of its proper divisors (1314582384).

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

677681856 is a wasteful number, since it uses less digits than its factorization.

677681856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392198 (or 392182 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 677681856 is about 26032.3232923994. The cubic root of 677681856 is about 878.3655335994.

The spelling of 677681856 in words is "six hundred seventy-seven million, six hundred eighty-one thousand, eight hundred fifty-six".