678382655 has 8 divisors (see below), whose sum is σ = 823867632. Its totient is φ = 536167168.

The previous prime is 678382633. The next prime is 678382657. The reversal of 678382655 is 556283876.

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

It is a cyclic number.

It is not a de Polignac number, because 678382655 - 2⁶ = 678382591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678382657) 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 7 ways as a sum of consecutive naturals, for example, 816914 + ... + 817743.

It is an arithmetic number, because the mean of its divisors is an integer number (102983454).

Almost surely, 2^678382655 is an apocalyptic number.

678382655 is a deficient number, since it is larger than the sum of its proper divisors (145484977).

678382655 is a wasteful number, since it uses less digits than its factorization.

678382655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634745.

The product of its digits is 2419200, while the sum is 50.

The square root of 678382655 is about 26045.7799844812. The cubic root of 678382655 is about 878.6682054302.

The spelling of 678382655 in words is "six hundred seventy-eight million, three hundred eighty-two thousand, six hundred fifty-five".