16166609 has 8 divisors (see below), whose sum is σ = 17202528. Its totient is φ = 15140160.

The previous prime is 16166603. The next prime is 16166611. The reversal of 16166609 is 90666161.

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 16166609 - 2¹² = 16162513 is a prime.

It is a super-2 number, since 2×16166609² = 522718493117762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16166603) 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, 1334 + ... + 5840.

It is an arithmetic number, because the mean of its divisors is an integer number (2150316).

Almost surely, 2^16166609 is an apocalyptic number.

It is an amenable number.

16166609 is a deficient number, since it is larger than the sum of its proper divisors (1035919).

16166609 is a wasteful number, since it uses less digits than its factorization.

16166609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4735.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 16166609 is about 4020.7721895178. The cubic root of 16166609 is about 252.8558339611.

The spelling of 16166609 in words is "sixteen million, one hundred sixty-six thousand, six hundred nine".