66512318 has 8 divisors (see below), whose sum is σ = 100797312. Its totient is φ = 32913216.

The previous prime is 66512311. The next prime is 66512323. The reversal of 66512318 is 81321566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66512311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171230 + ... + 171617.

It is an arithmetic number, because the mean of its divisors is an integer number (12599664).

Almost surely, 2^66512318 is an apocalyptic number.

66512318 is a deficient number, since it is larger than the sum of its proper divisors (34284994).

66512318 is a wasteful number, since it uses less digits than its factorization.

66512318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342946.

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

The square root of 66512318 is about 8155.5084452166. The cubic root of 66512318 is about 405.1669646386.

The spelling of 66512318 in words is "sixty-six million, five hundred twelve thousand, three hundred eighteen".