18066081 has 16 divisors (see below), whose sum is σ = 26673408. Its totient is φ = 10784400.

The previous prime is 18066077. The next prime is 18066091.

18066081 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18066081 - 2² = 18066077 is a prime.

It is a super-2 number, since 2×18066081² = 652766565397122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18066011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1875 + ... + 6296.

It is an arithmetic number, because the mean of its divisors is an integer number (1667088).

Almost surely, 2^18066081 is an apocalyptic number.

18066081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18066081 is a deficient number, since it is larger than the sum of its proper divisors (8607327).

18066081 is a wasteful number, since it uses less digits than its factorization.

18066081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8252.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 18066081 is about 4250.4212732387. The cubic root of 18066081 is about 262.3944537126.

It can be divided in two parts, 1806 and 6081, that added together give a palindrome (7887).

The spelling of 18066081 in words is "eighteen million, sixty-six thousand, eighty-one".