16663289 has 8 divisors (see below), whose sum is σ = 16911360. Its totient is φ = 16417296.

The previous prime is 16663279. The next prime is 16663291. The reversal of 16663289 is 98236661.

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

It is a cyclic number.

It is not a de Polignac number, because 16663289 - 2⁸ = 16663033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16663219) 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, 22367 + ... + 23099.

It is an arithmetic number, because the mean of its divisors is an integer number (2113920).

Almost surely, 2^16663289 is an apocalyptic number.

It is an amenable number.

16663289 is a deficient number, since it is larger than the sum of its proper divisors (248071).

16663289 is a wasteful number, since it uses less digits than its factorization.

16663289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039.

The product of its digits is 93312, while the sum is 41.

The square root of 16663289 is about 4082.0692056848. The cubic root of 16663289 is about 255.4192207132.

The spelling of 16663289 in words is "sixteen million, six hundred sixty-three thousand, two hundred eighty-nine".