16165066 has 4 divisors (see below), whose sum is σ = 24247602. Its totient is φ = 8082532.

The previous prime is 16165063. The next prime is 16165073. The reversal of 16165066 is 66056161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66056161 = 23 ⋅2872007.

It can be written as a sum of positive squares in only one way, i.e., 9431041 + 6734025 = 3071^2 + 2595^2 .

It is a super-2 number, since 2×16165066² = 522618717568712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16165063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4041265 + ... + 4041268.

Almost surely, 2^16165066 is an apocalyptic number.

16165066 is a deficient number, since it is larger than the sum of its proper divisors (8082536).

16165066 is an equidigital number, since it uses as much as digits as its factorization.

16165066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8082535.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 16165066 is about 4020.5803063737. The cubic root of 16165066 is about 252.8477892115.

The spelling of 16165066 in words is "sixteen million, one hundred sixty-five thousand, sixty-six".