676947978 has 24 divisors (see below), whose sum is σ = 1676252448. Its totient is φ = 193413672.

The previous prime is 676947977. The next prime is 676948037. The reversal of 676947978 is 879749676.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (676947977) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2686176 + ... + 2686427.

It is an arithmetic number, because the mean of its divisors is an integer number (69843852).

Almost surely, 2^676947978 is an apocalyptic number.

676947978 is an abundant number, since it is smaller than the sum of its proper divisors (999304470).

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

676947978 is a wasteful number, since it uses less digits than its factorization.

676947978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372618 (or 5372615 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The square root of 676947978 is about 26018.2239593712. The cubic root of 676947978 is about 878.0483513481.

It can be divided in two parts, 6 and 76947978, that added together give a square (76947984 = 8772²).

The spelling of 676947978 in words is "six hundred seventy-six million, nine hundred forty-seven thousand, nine hundred seventy-eight".