677819778 has 16 divisors (see below), whose sum is σ = 1356025536. Its totient is φ = 225875600.

The previous prime is 677819777. The next prime is 677819783. The reversal of 677819778 is 877918776.

It is not an unprimeable number, because it can be changed into a prime (677819777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10003 + ... + 38153.

It is an arithmetic number, because the mean of its divisors is an integer number (84751596).

Almost surely, 2^677819778 is an apocalyptic number.

677819778 is an abundant number, since it is smaller than the sum of its proper divisors (678205758).

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

677819778 is a wasteful number, since it uses less digits than its factorization.

677819778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32169.

The product of its digits is 8297856, while the sum is 60.

The square root of 677819778 is about 26034.9722104711. The cubic root of 677819778 is about 878.4251179567.

The spelling of 677819778 in words is "six hundred seventy-seven million, eight hundred nineteen thousand, seven hundred seventy-eight".