199966888800 has 864 divisors, whose sum is σ = 839070296064. Its totient is φ = 43849728000.

The previous prime is 199966888787. The next prime is 199966888801. The reversal of 199966888800 is 8888669991.

199966888800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199966888801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 204673912 + ... + 204674888.

It is an arithmetic number, because the mean of its divisors is an integer number (971146176).

Almost surely, 2^199966888800 is an apocalyptic number.

199966888800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199966888800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419535148032).

199966888800 is an abundant number, since it is smaller than the sum of its proper divisors (639103407264).

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

199966888800 is a wasteful number, since it uses less digits than its factorization.

199966888800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 72.

The spelling of 199966888800 in words is "one hundred ninety-nine billion, nine hundred sixty-six million, eight hundred eighty-eight thousand, eight hundred".