66018760 has 64 divisors (see below), whose sum is σ = 153679680. Its totient is φ = 25509120.

The previous prime is 66018721. The next prime is 66018811. The reversal of 66018760 is 6781066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225174 + ... + 225466.

It is an arithmetic number, because the mean of its divisors is an integer number (2401245).

Almost surely, 2^66018760 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 66018760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76839840).

66018760 is an abundant number, since it is smaller than the sum of its proper divisors (87660920).

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

66018760 is a wasteful number, since it uses less digits than its factorization.

66018760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 66018760 is about 8125.1929207866. The cubic root of 66018760 is about 404.1622881636.

The spelling of 66018760 in words is "sixty-six million, eighteen thousand, seven hundred sixty".