66304425 has 24 divisors (see below), whose sum is σ = 119590560. Its totient is φ = 32147200.

The previous prime is 66304393. The next prime is 66304439. The reversal of 66304425 is 52440366.

It is not a de Polignac number, because 66304425 - 2⁵ = 66304393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66304392 and 66304401.

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 23 ways as a sum of consecutive naturals, for example, 39360 + ... + 41009.

It is an arithmetic number, because the mean of its divisors is an integer number (4982940).

Almost surely, 2^66304425 is an apocalyptic number.

It is an amenable number.

66304425 is a deficient number, since it is larger than the sum of its proper divisors (53286135).

66304425 is a wasteful number, since it uses less digits than its factorization.

66304425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80393 (or 80388 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 66304425 is about 8142.7529128668. The cubic root of 66304425 is about 404.7443898446.

The spelling of 66304425 in words is "sixty-six million, three hundred four thousand, four hundred twenty-five".