16680189 has 4 divisors (see below), whose sum is σ = 22240256. Its totient is φ = 11120124.

The previous prime is 16680163. The next prime is 16680199. The reversal of 16680189 is 98108661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16680189 - 2⁷ = 16680061 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 (16680199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780029 + ... + 2780034.

It is an arithmetic number, because the mean of its divisors is an integer number (5560064).

Almost surely, 2^16680189 is an apocalyptic number.

It is an amenable number.

16680189 is a deficient number, since it is larger than the sum of its proper divisors (5560067).

16680189 is an equidigital number, since it uses as much as digits as its factorization.

16680189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5560066.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 16680189 is about 4084.1387096914. The cubic root of 16680189 is about 255.5055407338.

The spelling of 16680189 in words is "sixteen million, six hundred eighty thousand, one hundred eighty-nine".