16669643346 has 80 divisors (see below), whose sum is σ = 39091719744. Its totient is φ = 5299230816.

The previous prime is 16669643303. The next prime is 16669643351. The reversal of 16669643346 is 64334696661.

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

It is a junction number, because it is equal to n+sod(n) for n = 16669643292 and 16669643301.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1286476 + ... + 1299368.

Almost surely, 2^16669643346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16669643346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19545859872).

16669643346 is an abundant number, since it is smaller than the sum of its proper divisors (22422076398).

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

16669643346 is a wasteful number, since it uses less digits than its factorization.

16669643346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13277 (or 13268 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 54.

The spelling of 16669643346 in words is "sixteen billion, six hundred sixty-nine million, six hundred forty-three thousand, three hundred forty-six".