18066516 has 24 divisors (see below), whose sum is σ = 45398304. Its totient is φ = 5558880.

The previous prime is 18066487. The next prime is 18066571. The reversal of 18066516 is 61566081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57750 + ... + 58061.

It is an arithmetic number, because the mean of its divisors is an integer number (1891596).

Almost surely, 2^18066516 is an apocalyptic number.

It is an amenable number.

18066516 is an abundant number, since it is smaller than the sum of its proper divisors (27331788).

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

18066516 is a wasteful number, since it uses less digits than its factorization.

18066516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115831 (or 115829 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 18066516 is about 4250.4724443290. The cubic root of 18066516 is about 262.3965596974.

The spelling of 18066516 in words is "eighteen million, sixty-six thousand, five hundred sixteen".