18180066 has 16 divisors (see below), whose sum is σ = 36859104. Its totient is φ = 5976864.

The previous prime is 18180059. The next prime is 18180073. The reversal of 18180066 is 66008181.

It is an interprime number because it is at equal distance from previous prime (18180059) and next prime (18180073).

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 in 7 ways as a sum of consecutive naturals, for example, 20316 + ... + 21191.

It is an arithmetic number, because the mean of its divisors is an integer number (2303694).

Almost surely, 2^18180066 is an apocalyptic number.

18180066 is an abundant number, since it is smaller than the sum of its proper divisors (18679038).

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

18180066 is a wasteful number, since it uses less digits than its factorization.

18180066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41585.

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

The square root of 18180066 is about 4263.8088606315. The cubic root of 18180066 is about 262.9451422158.

The spelling of 18180066 in words is "eighteen million, one hundred eighty thousand, sixty-six".