66312268 has 12 divisors (see below), whose sum is σ = 126596232. Its totient is φ = 30141920.

The previous prime is 66312199. The next prime is 66312271. The reversal of 66312268 is 86221366.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753505 + ... + 753592.

It is an arithmetic number, because the mean of its divisors is an integer number (10549686).

Almost surely, 2^66312268 is an apocalyptic number.

It is an amenable number.

66312268 is a deficient number, since it is larger than the sum of its proper divisors (60283964).

66312268 is a wasteful number, since it uses less digits than its factorization.

66312268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507112 (or 1507110 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 66312268 is about 8143.2344925097. The cubic root of 66312268 is about 404.7603479806.

The spelling of 66312268 in words is "sixty-six million, three hundred twelve thousand, two hundred sixty-eight".