65216625 has 32 divisors (see below), whose sum is σ = 110338176. Its totient is φ = 34200000.

The previous prime is 65216623. The next prime is 65216639. The reversal of 65216625 is 52661256.

It is a happy number.

It is not a de Polignac number, because 65216625 - 2¹ = 65216623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65216623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21450 + ... + 24300.

It is an arithmetic number, because the mean of its divisors is an integer number (3448068).

Almost surely, 2^65216625 is an apocalyptic number.

It is an amenable number.

65216625 is a deficient number, since it is larger than the sum of its proper divisors (45121551).

65216625 is a wasteful number, since it uses less digits than its factorization.

65216625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930 (or 2920 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 65216625 is about 8075.6810858280. The cubic root of 65216625 is about 402.5187419741.

The spelling of 65216625 in words is "sixty-five million, two hundred sixteen thousand, six hundred twenty-five".