66330725 has 12 divisors (see below), whose sum is σ = 84164256. Its totient is φ = 51829680.

The previous prime is 66330713. The next prime is 66330739. The reversal of 66330725 is 52703366.

It is not a de Polignac number, because 66330725 - 2¹⁰ = 66329701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66330691 and 66330700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29777 + ... + 31926.

It is an arithmetic number, because the mean of its divisors is an integer number (7013688).

Almost surely, 2^66330725 is an apocalyptic number.

It is an amenable number.

66330725 is a deficient number, since it is larger than the sum of its proper divisors (17833531).

66330725 is a wasteful number, since it uses less digits than its factorization.

66330725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61756 (or 61751 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 32.

The square root of 66330725 is about 8144.3676857077. The cubic root of 66330725 is about 404.7978974364.

The spelling of 66330725 in words is "sixty-six million, three hundred thirty thousand, seven hundred twenty-five".