18066078 has 28 divisors (see below), whose sum is σ = 40633368. Its totient is φ = 6021540.

The previous prime is 18066077. The next prime is 18066091. The reversal of 18066078 is 87066081.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18066071) 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 13 ways as a sum of consecutive naturals, for example, 4738 + ... + 7653.

Almost surely, 2^18066078 is an apocalyptic number.

18066078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18066078 is an abundant number, since it is smaller than the sum of its proper divisors (22567290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18066078 is an equidigital number, since it uses as much as digits as its factorization.

18066078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12411 (or 12396 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 18066078 is about 4250.4209203325. The cubic root of 18066078 is about 262.3944391885.

The spelling of 18066078 in words is "eighteen million, sixty-six thousand, seventy-eight".