66328516800 has 1008 divisors, whose sum is σ = 296358462400. Its totient is φ = 13981040640.

The previous prime is 66328516783. The next prime is 66328516801. The reversal of 66328516800 is 861582366.

66328516800 is a `hidden beast` number, since 6 + 632 + 8 + 5 + 1 + 6 + 8 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1008).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (66328516801) 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, 64209084 + ... + 64210116.

Almost surely, 2^66328516800 is an apocalyptic number.

66328516800 is a gapful number since it is divisible by the number (60) 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 66328516800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148179231200).

66328516800 is an abundant number, since it is smaller than the sum of its proper divisors (230029945600).

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

66328516800 is a wasteful number, since it uses less digits than its factorization.

66328516800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095 (or 1063 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 66328516800 in words is "sixty-six billion, three hundred twenty-eight million, five hundred sixteen thousand, eight hundred".