678137678 has 8 divisors (see below), whose sum is σ = 1023943440. Its totient is φ = 336823200.

The previous prime is 678137627. The next prime is 678137687. The reversal of 678137678 is 876731876.

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, 1122443 + ... + 1123046.

It is an arithmetic number, because the mean of its divisors is an integer number (127992930).

Almost surely, 2^678137678 is an apocalyptic number.

678137678 is a deficient number, since it is larger than the sum of its proper divisors (345805762).

678137678 is a wasteful number, since it uses less digits than its factorization.

678137678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245642.

The product of its digits is 2370816, while the sum is 53.

The square root of 678137678 is about 26041.0767442516. The cubic root of 678137678 is about 878.5624247103.

The spelling of 678137678 in words is "six hundred seventy-eight million, one hundred thirty-seven thousand, six hundred seventy-eight".