678804641 has 8 divisors (see below), whose sum is σ = 685461504. Its totient is φ = 672180480.

The previous prime is 678804619. The next prime is 678804667. The reversal of 678804641 is 146408876.

678804641 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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678804641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 678804592 and 678804601.

It is not an unprimeable number, because it can be changed into a prime (678804341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34625 + ... + 50561.

It is an arithmetic number, because the mean of its divisors is an integer number (85682688).

Almost surely, 2^678804641 is an apocalyptic number.

It is an amenable number.

678804641 is a deficient number, since it is larger than the sum of its proper divisors (6656863).

678804641 is a wasteful number, since it uses less digits than its factorization.

678804641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16351.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 678804641 is about 26053.8795767540. The cubic root of 678804641 is about 878.8503586850.

The spelling of 678804641 in words is "six hundred seventy-eight million, eight hundred four thousand, six hundred forty-one".