66018056 has 32 divisors (see below), whose sum is σ = 134621760. Its totient is φ = 30169152.

The previous prime is 66018053. The next prime is 66018067. The reversal of 66018056 is 65081066.

It is not an unprimeable number, because it can be changed into a prime (66018053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7631 + ... + 13793.

It is an arithmetic number, because the mean of its divisors is an integer number (4206930).

Almost surely, 2^66018056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66018056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67310880).

66018056 is an abundant number, since it is smaller than the sum of its proper divisors (68603704).

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

66018056 is a wasteful number, since it uses less digits than its factorization.

66018056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6285 (or 6281 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 66018056 is about 8125.1495986228. The cubic root of 66018056 is about 404.1608515454.

The spelling of 66018056 in words is "sixty-six million, eighteen thousand, fifty-six".