16066505 has 16 divisors (see below), whose sum is σ = 23729664. Its totient is φ = 10169280.

The previous prime is 16066487. The next prime is 16066507. The reversal of 16066505 is 50566061.

It is not a de Polignac number, because 16066505 - 2²⁰ = 15017929 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16066507) 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, 17201 + ... + 18110.

It is an arithmetic number, because the mean of its divisors is an integer number (1483104).

Almost surely, 2^16066505 is an apocalyptic number.

It is an amenable number.

16066505 is a deficient number, since it is larger than the sum of its proper divisors (7663159).

16066505 is a wasteful number, since it uses less digits than its factorization.

16066505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35336.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 16066505 is about 4008.3045044008. The cubic root of 16066505 is about 252.3328567395.

The spelling of 16066505 in words is "sixteen million, sixty-six thousand, five hundred five".