66018732 has 48 divisors (see below), whose sum is σ = 171625440. Its totient is φ = 19611648.

The previous prime is 66018721. The next prime is 66018811. The reversal of 66018732 is 23781066.

It is a junction number, because it is equal to n+sod(n) for n = 66018693 and 66018702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2773 + ... + 11820.

It is an arithmetic number, because the mean of its divisors is an integer number (3575530).

Almost surely, 2^66018732 is an apocalyptic number.

It is an amenable number.

66018732 is an abundant number, since it is smaller than the sum of its proper divisors (105606708).

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

66018732 is a wasteful number, since it uses less digits than its factorization.

66018732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14642 (or 14640 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 66018732 is about 8125.1911977504. The cubic root of 66018732 is about 404.1622310256.

Adding to 66018732 its reverse (23781066), we get a palindrome (89799798).

The spelling of 66018732 in words is "sixty-six million, eighteen thousand, seven hundred thirty-two".