65625525 has 192 divisors, whose sum is σ = 157132800. Its totient is φ = 26127360.

The previous prime is 65625503. The next prime is 65625557. The reversal of 65625525 is 52552656.

65625525 = 280² + 281² + ... + 602².

65625525 is a `hidden beast` number, since 6 + 5 + 625 + 5 + 25 = 666.

It is not a de Polignac number, because 65625525 - 2⁵ = 65625493 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 65625525.

It is a congruent number.

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 191 ways as a sum of consecutive naturals, for example, 1526154 + ... + 1526196.

It is an arithmetic number, because the mean of its divisors is an integer number (818400).

Almost surely, 2^65625525 is an apocalyptic number.

It is an amenable number.

65625525 is an abundant number, since it is smaller than the sum of its proper divisors (91507275).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65625525 is a wasteful number, since it uses less digits than its factorization.

65625525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 94 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 65625525 is about 8100.9582766485. The cubic root of 65625525 is about 403.3582371224.

The spelling of 65625525 in words is "sixty-five million, six hundred twenty-five thousand, five hundred twenty-five".