66785612 has 24 divisors (see below), whose sum is σ = 118818336. Its totient is φ = 32842368.

The previous prime is 66785611. The next prime is 66785623. The reversal of 66785612 is 21658766.

It is a self number, because there is not a number n which added to its sum of digits gives 66785612.

It is not an unprimeable number, because it can be changed into a prime (66785611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70808 + ... + 71744.

It is an arithmetic number, because the mean of its divisors is an integer number (4950764).

Almost surely, 2^66785612 is an apocalyptic number.

It is an amenable number.

66785612 is a deficient number, since it is larger than the sum of its proper divisors (52032724).

66785612 is a wasteful number, since it uses less digits than its factorization.

66785612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 1215 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 66785612 is about 8172.2464475810. The cubic root of 66785612 is about 405.7211396099.

The spelling of 66785612 in words is "sixty-six million, seven hundred eighty-five thousand, six hundred twelve".