16006665209 has 8 divisors (see below), whose sum is σ = 16532555520. Its totient is φ = 15481371600.

The previous prime is 16006665187. The next prime is 16006665253. The reversal of 16006665209 is 90256660061.

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 16006665209 - 2²⁸ = 15738229753 is a prime.

It is a super-2 number, since 2×16006665209² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16006625209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94319 + ... + 202260.

It is an arithmetic number, because the mean of its divisors is an integer number (2066569440).

Almost surely, 2^16006665209 is an apocalyptic number.

It is an amenable number.

16006665209 is a deficient number, since it is larger than the sum of its proper divisors (525890311).

16006665209 is a wasteful number, since it uses less digits than its factorization.

16006665209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298351.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 16006665209 in words is "sixteen billion, six million, six hundred sixty-five thousand, two hundred nine".