65544625 has 16 divisors (see below), whose sum is σ = 82280016. Its totient is φ = 52128000.

The previous prime is 65544607. The next prime is 65544629. The reversal of 65544625 is 52644556.

It can be written as a sum of positive squares in 8 ways, for example, as 55413136 + 10131489 = 7444^2 + 3183^2 .

It is not a de Polignac number, because 65544625 - 2⁵ = 65544593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65544629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21177 + ... + 24073.

It is an arithmetic number, because the mean of its divisors is an integer number (5142501).

Almost surely, 2^65544625 is an apocalyptic number.

It is an amenable number.

65544625 is a deficient number, since it is larger than the sum of its proper divisors (16735391).

65544625 is a wasteful number, since it uses less digits than its factorization.

65544625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093 (or 3083 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The square root of 65544625 is about 8095.9635004118. The cubic root of 65544625 is about 403.1924220705.

The spelling of 65544625 in words is "sixty-five million, five hundred forty-four thousand, six hundred twenty-five".