16666344 has 128 divisors (see below), whose sum is σ = 50688000. Its totient is φ = 5054400.

The previous prime is 16666343. The next prime is 16666357. The reversal of 16666344 is 44366661.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 16666299 and 16666308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666343) 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, 127159 + ... + 127289.

It is an arithmetic number, because the mean of its divisors is an integer number (396000).

Almost surely, 2^16666344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16666344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25344000).

16666344 is an abundant number, since it is smaller than the sum of its proper divisors (34021656).

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

16666344 is a wasteful number, since it uses less digits than its factorization.

16666344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 186 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 16666344 is about 4082.4433860128. The cubic root of 16666344 is about 255.4348290371.

The spelling of 16666344 in words is "sixteen million, six hundred sixty-six thousand, three hundred forty-four".