16669447 has 8 divisors (see below), whose sum is σ = 17020800. Its totient is φ = 16320504.

The previous prime is 16669427. The next prime is 16669453. The reversal of 16669447 is 74496661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16669447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16669427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20788 + ... + 21574.

It is an arithmetic number, because the mean of its divisors is an integer number (2127600).

Almost surely, 2^16669447 is an apocalyptic number.

16669447 is a deficient number, since it is larger than the sum of its proper divisors (351353).

16669447 is an equidigital number, since it uses as much as digits as its factorization.

16669447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205.

The product of its digits is 217728, while the sum is 43.

The square root of 16669447 is about 4082.8234103375. The cubic root of 16669447 is about 255.4506806458.

The spelling of 16669447 in words is "sixteen million, six hundred sixty-nine thousand, four hundred forty-seven".