16684161 has 16 divisors (see below), whose sum is σ = 24037440. Its totient is φ = 10232640.

The previous prime is 16684159. The next prime is 16684181. The reversal of 16684161 is 16148661.

16684161 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16684161 - 2¹ = 16684159 is a prime.

It is a super-2 number, since 2×16684161² = 556722456547842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16684121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15831 + ... + 16851.

It is an arithmetic number, because the mean of its divisors is an integer number (1502340).

Almost surely, 2^16684161 is an apocalyptic number.

It is an amenable number.

16684161 is a deficient number, since it is larger than the sum of its proper divisors (7353279).

16684161 is a wasteful number, since it uses less digits than its factorization.

16684161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456.

The product of its digits is 6912, while the sum is 33.

The square root of 16684161 is about 4084.6249521835. The cubic root of 16684161 is about 255.5258200297.

The spelling of 16684161 in words is "sixteen million, six hundred eighty-four thousand, one hundred sixty-one".