16066091 has 4 divisors (see below), whose sum is σ = 16584384. Its totient is φ = 15547800.

The previous prime is 16066081. The next prime is 16066109. The reversal of 16066091 is 19066061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16066091 - 2⁶ = 16066027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16066021) 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 in 3 ways as a sum of consecutive naturals, for example, 259100 + ... + 259161.

It is an arithmetic number, because the mean of its divisors is an integer number (4146096).

Almost surely, 2^16066091 is an apocalyptic number.

16066091 is a deficient number, since it is larger than the sum of its proper divisors (518293).

16066091 is an equidigital number, since it uses as much as digits as its factorization.

16066091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518292.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 16066091 is about 4008.2528612851. The cubic root of 16066091 is about 252.3306893588.

The spelling of 16066091 in words is "sixteen million, sixty-six thousand, ninety-one".