678668850 has 72 divisors (see below), whose sum is σ = 1828515780. Its totient is φ = 180466560.

The previous prime is 678668821. The next prime is 678668863. The reversal of 678668850 is 58866876.

It can be written as a sum of positive squares in 6 ways, for example, as 91527489 + 587141361 = 9567^2 + 24231^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 173112 + ... + 176988.

Almost surely, 2^678668850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678668850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914257890).

678668850 is an abundant number, since it is smaller than the sum of its proper divisors (1149846930).

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

678668850 is a wasteful number, since it uses less digits than its factorization.

678668850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4284 (or 4276 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The square root of 678668850 is about 26051.2734813483. The cubic root of 678668850 is about 878.7917517749.

The spelling of 678668850 in words is "six hundred seventy-eight million, six hundred sixty-eight thousand, eight hundred fifty".