66330513512 has 16 divisors (see below), whose sum is σ = 125064518400. Its totient is φ = 32979975280.

The previous prime is 66330513503. The next prime is 66330513517. The reversal of 66330513512 is 21531503366.

66330513512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66330513512² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66330513517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23158664 + ... + 23161527.

It is an arithmetic number, because the mean of its divisors is an integer number (7816532400).

Almost surely, 2^66330513512 is an apocalyptic number.

It is an amenable number.

66330513512 is a deficient number, since it is larger than the sum of its proper divisors (58734004888).

66330513512 is a wasteful number, since it uses less digits than its factorization.

66330513512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46320376 (or 46320372 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 35.

The spelling of 66330513512 in words is "sixty-six billion, three hundred thirty million, five hundred thirteen thousand, five hundred twelve".