18066750 has 128 divisors (see below), whose sum is σ = 51891840. Its totient is φ = 4147200.

The previous prime is 18066749. The next prime is 18066809. The reversal of 18066750 is 5766081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 165696 + ... + 165804.

It is an arithmetic number, because the mean of its divisors is an integer number (405405).

Almost surely, 2^18066750 is an apocalyptic number.

18066750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 4250×4251.

It is a practical number, because each smaller number is the sum of distinct divisors of 18066750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25945920).

18066750 is an abundant number, since it is smaller than the sum of its proper divisors (33825090).

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

18066750 is a wasteful number, since it uses less digits than its factorization.

18066750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 18066750 is about 4250.4999705917. The cubic root of 18066750 is about 262.3976925579.

The spelling of 18066750 in words is "eighteen million, sixty-six thousand, seven hundred fifty".