66465220325 has 24 divisors (see below), whose sum is σ = 94735210368. Its totient is φ = 45312684480.

The previous prime is 66465220319. The next prime is 66465220343. The reversal of 66465220325 is 52302256466.

It is not a de Polignac number, because 66465220325 - 2³² = 62170253029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1067417 + ... + 1127966.

It is an arithmetic number, because the mean of its divisors is an integer number (3947300432).

Almost surely, 2^66465220325 is an apocalyptic number.

It is an amenable number.

66465220325 is a deficient number, since it is larger than the sum of its proper divisors (28269990043).

66465220325 is a wasteful number, since it uses less digits than its factorization.

66465220325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195573 (or 2195568 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 66465220325 in words is "sixty-six billion, four hundred sixty-five million, two hundred twenty thousand, three hundred twenty-five".