678681066 has 40 divisors (see below), whose sum is σ = 1583528544. Its totient is φ = 193904760.

The previous prime is 678681019. The next prime is 678681067. The reversal of 678681066 is 660186876.

It is not an unprimeable number, because it can be changed into a prime (678681067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9150 + ... + 37961.

Almost surely, 2^678681066 is an apocalyptic number.

678681066 is an abundant number, since it is smaller than the sum of its proper divisors (904847478).

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

678681066 is an equidigital number, since it uses as much as digits as its factorization.

678681066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47144 (or 47123 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 678681066 is about 26051.5079410003. The cubic root of 678681066 is about 878.7970244768.

It can be divided in two parts, 6786810 and 66, that added together give a palindrome (6786876).

The spelling of 678681066 in words is "six hundred seventy-eight million, six hundred eighty-one thousand, sixty-six".