166816800 has 144 divisors (see below), whose sum is σ = 603398880. Its totient is φ = 44478720.

The previous prime is 166816781. The next prime is 166816813. The reversal of 166816800 is 8618661.

166816800 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17739 + ... + 25461.

It is an arithmetic number, because the mean of its divisors is an integer number (4190270).

Almost surely, 2^166816800 is an apocalyptic number.

166816800 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 166816800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301699440).

166816800 is an abundant number, since it is smaller than the sum of its proper divisors (436582080).

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

166816800 is a wasteful number, since it uses less digits than its factorization.

166816800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752 (or 7733 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 166816800 is about 12915.7578174879. The cubic root of 166816800 is about 550.4864016717.

The spelling of 166816800 in words is "one hundred sixty-six million, eight hundred sixteen thousand, eight hundred".