16662189 has 16 divisors (see below), whose sum is σ = 23398272. Its totient is φ = 10526208.

The previous prime is 16662187. The next prime is 16662197. The reversal of 16662189 is 98126661.

It is not a de Polignac number, because 16662189 - 2¹ = 16662187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16662187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6729 + ... + 8865.

It is an arithmetic number, because the mean of its divisors is an integer number (1462392).

Almost surely, 2^16662189 is an apocalyptic number.

It is an amenable number.

16662189 is a deficient number, since it is larger than the sum of its proper divisors (6736083).

16662189 is a wasteful number, since it uses less digits than its factorization.

16662189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276.

The product of its digits is 31104, while the sum is 39.

The square root of 16662189 is about 4081.9344678718. The cubic root of 16662189 is about 255.4136002277.

The spelling of 16662189 in words is "sixteen million, six hundred sixty-two thousand, one hundred eighty-nine".