18066888 has 120 divisors (see below), whose sum is σ = 58969350. Its totient is φ = 5152896.

The previous prime is 18066887. The next prime is 18066889. The reversal of 18066888 is 88866081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18066887) and next prime (18066889).

It can be written as a sum of positive squares in only one way, i.e., 17288964 + 777924 = 4158^2 + 882^2 .

It is not an unprimeable number, because it can be changed into a prime (18066883) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 31468 + ... + 32036.

Almost surely, 2^18066888 is an apocalyptic number.

18066888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18066888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29484675).

18066888 is an abundant number, since it is smaller than the sum of its proper divisors (40902462).

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

18066888 is a wasteful number, since it uses less digits than its factorization.

18066888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 18066888 is about 4250.5162039451. The cubic root of 18066888 is about 262.3983606506.

The spelling of 18066888 in words is "eighteen million, sixty-six thousand, eight hundred eighty-eight".