678968158 has 8 divisors (see below), whose sum is σ = 1111038840. Its totient is φ = 308621880.

The previous prime is 678968141. The next prime is 678968161. The reversal of 678968158 is 851869876.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15431073 + ... + 15431116.

It is an arithmetic number, because the mean of its divisors is an integer number (138879855).

Almost surely, 2^678968158 is an apocalyptic number.

678968158 is a deficient number, since it is larger than the sum of its proper divisors (432070682).

678968158 is a wasteful number, since it uses less digits than its factorization.

678968158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30862202.

The product of its digits is 5806080, while the sum is 58.

The square root of 678968158 is about 26057.0174425240. The cubic root of 678968158 is about 878.9209216658.

It can be divided in two parts, 6789 and 68158, that added together give a palindrome (74947).

The spelling of 678968158 in words is "six hundred seventy-eight million, nine hundred sixty-eight thousand, one hundred fifty-eight".