65986625 has 16 divisors (see below), whose sum is σ = 83591040. Its totient is φ = 51994800.

The previous prime is 65986621. The next prime is 65986681. The reversal of 65986625 is 52668956.

65986625 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 65986625 - 2² = 65986621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65986625.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65986621) 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 15 ways as a sum of consecutive naturals, for example, 4436 + ... + 12314.

It is an arithmetic number, because the mean of its divisors is an integer number (5224440).

Almost surely, 2^65986625 is an apocalyptic number.

It is an amenable number.

65986625 is a deficient number, since it is larger than the sum of its proper divisors (17604415).

65986625 is an equidigital number, since it uses as much as digits as its factorization.

65986625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7961 (or 7951 counting only the distinct ones).

The product of its digits is 777600, while the sum is 47.

The square root of 65986625 is about 8123.2151885814. The cubic root of 65986625 is about 404.0967014375.

The spelling of 65986625 in words is "sixty-five million, nine hundred eighty-six thousand, six hundred twenty-five".