200066778 has 48 divisors (see below), whose sum is σ = 460363176. Its totient is φ = 62576640.

The previous prime is 200066729. The next prime is 200066791. The reversal of 200066778 is 877660002.

It can be written as a sum of positive squares in 4 ways, for example, as 90383049 + 109683729 = 9507^2 + 10473^2 .

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 128050 + ... + 129602.

Almost surely, 2^200066778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200066778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230181588).

200066778 is an abundant number, since it is smaller than the sum of its proper divisors (260296398).

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

200066778 is a wasteful number, since it uses less digits than its factorization.

200066778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999 (or 1996 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 200066778 is about 14144.4963855204. The cubic root of 200066778 is about 584.8686270855.

The spelling of 200066778 in words is "two hundred million, sixty-six thousand, seven hundred seventy-eight".