16663163220 has 72 divisors (see below), whose sum is σ = 55139928480. Its totient is φ = 4039554240.

The previous prime is 16663163201. The next prime is 16663163221. The reversal of 16663163220 is 2236136661.

16663163220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16663163220² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16663163221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4205890 + ... + 4209849.

It is an arithmetic number, because the mean of its divisors is an integer number (765832340).

Almost surely, 2^16663163220 is an apocalyptic number.

16663163220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16663163220 is an abundant number, since it is smaller than the sum of its proper divisors (38476765260).

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

16663163220 is a wasteful number, since it uses less digits than its factorization.

16663163220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8415765 (or 8415760 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

Adding to 16663163220 its reverse (2236136661), we get a palindrome (18899299881).

The spelling of 16663163220 in words is "sixteen billion, six hundred sixty-three million, one hundred sixty-three thousand, two hundred twenty".