66563625 has 32 divisors (see below), whose sum is σ = 111646080. Its totient is φ = 35217600.

The previous prime is 66563617. The next prime is 66563639. The reversal of 66563625 is 52636566.

It is not a de Polignac number, because 66563625 - 2³ = 66563617 is a prime.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 51487 + ... + 52763.

It is an arithmetic number, because the mean of its divisors is an integer number (3488940).

Almost surely, 2^66563625 is an apocalyptic number.

It is an amenable number.

66563625 is a deficient number, since it is larger than the sum of its proper divisors (45082455).

66563625 is a wasteful number, since it uses less digits than its factorization.

66563625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434 (or 1424 counting only the distinct ones).

The product of its digits is 194400, while the sum is 39.

The square root of 66563625 is about 8158.6533815330. The cubic root of 66563625 is about 405.2711185717.

The spelling of 66563625 in words is "sixty-six million, five hundred sixty-three thousand, six hundred twenty-five".