16669643352 has 128 divisors (see below), whose sum is σ = 46422720000. Its totient is φ = 4963567616.

The previous prime is 16669643351. The next prime is 16669643371. The reversal of 16669643352 is 25334696661.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 16669643295 and 16669643304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16669643351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 686149 + ... + 710027.

It is an arithmetic number, because the mean of its divisors is an integer number (362677500).

Almost surely, 2^16669643352 is an apocalyptic number.

16669643352 is a gapful number since it is divisible by the number (12) 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 16669643352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23211360000).

16669643352 is an abundant number, since it is smaller than the sum of its proper divisors (29753076648).

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

16669643352 is a wasteful number, since it uses less digits than its factorization.

16669643352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23993 (or 23989 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 51.

The spelling of 16669643352 in words is "sixteen billion, six hundred sixty-nine million, six hundred forty-three thousand, three hundred fifty-two".