678133698 has 16 divisors (see below), whose sum is σ = 1479564576. Its totient is φ = 205495040.

The previous prime is 678133591. The next prime is 678133699. The reversal of 678133698 is 896331876.

It is a self number, because there is not a number n which added to its sum of digits gives 678133698.

It is not an unprimeable number, because it can be changed into a prime (678133699) 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, 5137311 + ... + 5137442.

It is an arithmetic number, because the mean of its divisors is an integer number (92472786).

Almost surely, 2^678133698 is an apocalyptic number.

678133698 is an abundant number, since it is smaller than the sum of its proper divisors (801430878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678133698 is a wasteful number, since it uses less digits than its factorization.

678133698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10274769.

The product of its digits is 1306368, while the sum is 51.

The square root of 678133698 is about 26041.0003264084. Note that the first 3 decimals coincide. The cubic root of 678133698 is about 878.5607059417.

The spelling of 678133698 in words is "six hundred seventy-eight million, one hundred thirty-three thousand, six hundred ninety-eight".