16066321920 has 960 divisors, whose sum is σ = 67006336320. Its totient is φ = 3633315840.

The previous prime is 16066321913. The next prime is 16066321961. The reversal of 16066321920 is 2912366061.

It is a happy number.

16066321920 is a `hidden beast` number, since 1 + 6 + 0 + 6 + 632 + 19 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 142179784 + ... + 142179896.

It is an arithmetic number, because the mean of its divisors is an integer number (69798267).

Almost surely, 2^16066321920 is an apocalyptic number.

16066321920 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 16066321920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33503168160).

16066321920 is an abundant number, since it is smaller than the sum of its proper divisors (50940014400).

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

16066321920 is a wasteful number, since it uses less digits than its factorization.

16066321920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

Adding to 16066321920 its reverse (2912366061), we get a palindrome (18978687981).

The spelling of 16066321920 in words is "sixteen billion, sixty-six million, three hundred twenty-one thousand, nine hundred twenty".