16669533456 has 80 divisors (see below), whose sum is σ = 47951653120. Its totient is φ = 5544443520.

The previous prime is 16669533421. The next prime is 16669533479. The reversal of 16669533456 is 65433596661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158346 + ... + 241686.

It is an arithmetic number, because the mean of its divisors is an integer number (599395664).

Almost surely, 2^16669533456 is an apocalyptic number.

16669533456 is a gapful number since it is divisible by the number (16) 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 16669533456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23975826560).

16669533456 is an abundant number, since it is smaller than the sum of its proper divisors (31282119664).

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

16669533456 is a wasteful number, since it uses less digits than its factorization.

16669533456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83821 (or 83809 counting only the distinct ones).

The product of its digits is 10497600, while the sum is 54.

The spelling of 16669533456 in words is "sixteen billion, six hundred sixty-nine million, five hundred thirty-three thousand, four hundred fifty-six".