678967646 has 8 divisors (see below), whose sum is σ = 1163944560. Its totient is φ = 290986128.

The previous prime is 678967643. The next prime is 678967697. The reversal of 678967646 is 646769876.

678967646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678967643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24248831 + ... + 24248858.

It is an arithmetic number, because the mean of its divisors is an integer number (145493070).

Almost surely, 2^678967646 is an apocalyptic number.

678967646 is a deficient number, since it is larger than the sum of its proper divisors (484976914).

678967646 is a wasteful number, since it uses less digits than its factorization.

678967646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48497698.

The product of its digits is 18289152, while the sum is 59.

The square root of 678967646 is about 26057.0076179135. The cubic root of 678967646 is about 878.9207007386.

The spelling of 678967646 in words is "six hundred seventy-eight million, nine hundred sixty-seven thousand, six hundred forty-six".