66216325 has 12 divisors (see below), whose sum is σ = 93838240. Its totient is φ = 45405360.

The previous prime is 66216323. The next prime is 66216361. The reversal of 66216325 is 52361266.

66216325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66216325 - 2¹ = 66216323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66216323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189015 + ... + 189364.

Almost surely, 2^66216325 is an apocalyptic number.

It is an amenable number.

66216325 is a deficient number, since it is larger than the sum of its proper divisors (27621915).

66216325 is a wasteful number, since it uses less digits than its factorization.

66216325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378396 (or 378391 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 66216325 is about 8137.3413963038. The cubic root of 66216325 is about 404.5650464319.

The spelling of 66216325 in words is "sixty-six million, two hundred sixteen thousand, three hundred twenty-five".