543666816 has 384 divisors, whose sum is σ = 2031644160. Its totient is φ = 140590080.

The previous prime is 543666811. The next prime is 543666829. The reversal of 543666816 is 618666345.

It is a tau number, because it is divible by the number of its divisors (384).

It is not an unprimeable number, because it can be changed into a prime (543666811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2394895 + ... + 2395121.

It is an arithmetic number, because the mean of its divisors is an integer number (5290740).

Almost surely, 2^543666816 is an apocalyptic number.

543666816 is a gapful number since it is divisible by the number (56) 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 543666816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1015822080).

543666816 is an abundant number, since it is smaller than the sum of its proper divisors (1487977344).

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

543666816 is a wasteful number, since it uses less digits than its factorization.

543666816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 250 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 543666816 is about 23316.6639123182. The cubic root of 543666816 is about 816.1643267671.

The spelling of 543666816 in words is "five hundred forty-three million, six hundred sixty-six thousand, eight hundred sixteen".