66125612 has 12 divisors (see below), whose sum is σ = 132251280. Its totient is φ = 28339536.

The previous prime is 66125603. The next prime is 66125639. The reversal of 66125612 is 21652166.

66125612 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180787 + ... + 1180842.

It is an arithmetic number, because the mean of its divisors is an integer number (11020940).

Almost surely, 2^66125612 is an apocalyptic number.

It is an amenable number.

66125612 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66125612 is a wasteful number, since it uses less digits than its factorization.

66125612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361640 (or 2361638 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 66125612 is about 8131.7656139365. The cubic root of 66125612 is about 404.3802174865.

Adding to 66125612 its reverse (21652166), we get a palindrome (87777778).

The spelling of 66125612 in words is "sixty-six million, one hundred twenty-five thousand, six hundred twelve".