18085066 has 4 divisors (see below), whose sum is σ = 27127602. Its totient is φ = 9042532.

The previous prime is 18085057. The next prime is 18085073. The reversal of 18085066 is 66058081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66058081 = 5081 ⋅13001.

It can be written as a sum of positive squares in only one way, i.e., 9174841 + 8910225 = 3029^2 + 2985^2 .

It is a super-2 number, since 2×18085066² = 654139224448712, which contains 22 as substring.

It is an unprimeable number.

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, 4521265 + ... + 4521268.

Almost surely, 2^18085066 is an apocalyptic number.

18085066 is a deficient number, since it is larger than the sum of its proper divisors (9042536).

18085066 is an equidigital number, since it uses as much as digits as its factorization.

18085066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9042535.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 18085066 is about 4252.6539948602. The cubic root of 18085066 is about 262.4863351919.

The spelling of 18085066 in words is "eighteen million, eighty-five thousand, sixty-six".