66625612 has 12 divisors (see below), whose sum is σ = 116708256. Its totient is φ = 33280400.

The previous prime is 66625589. The next prime is 66625627. The reversal of 66625612 is 21652666.

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, 3139 + ... + 11962.

It is an arithmetic number, because the mean of its divisors is an integer number (9725688).

Almost surely, 2^66625612 is an apocalyptic number.

It is an amenable number.

66625612 is a deficient number, since it is larger than the sum of its proper divisors (50082644).

66625612 is a wasteful number, since it uses less digits than its factorization.

66625612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16208 (or 16206 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 66625612 is about 8162.4513474813. The cubic root of 66625612 is about 405.3968816881.

The spelling of 66625612 in words is "sixty-six million, six hundred twenty-five thousand, six hundred twelve".