65611625 has 8 divisors (see below), whose sum is σ = 81883464. Its totient is φ = 52489200.

The previous prime is 65611621. The next prime is 65611631. The reversal of 65611625 is 52611656.

It can be written as a sum of positive squares in 4 ways, for example, as 2202256 + 63409369 = 1484^2 + 7963^2 .

It is not a de Polignac number, because 65611625 - 2² = 65611621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65611591 and 65611600.

It is not an unprimeable number, because it can be changed into a prime (65611621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262322 + ... + 262571.

It is an arithmetic number, because the mean of its divisors is an integer number (10235433).

Almost surely, 2^65611625 is an apocalyptic number.

It is an amenable number.

65611625 is a deficient number, since it is larger than the sum of its proper divisors (16271839).

65611625 is an equidigital number, since it uses as much as digits as its factorization.

65611625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524908 (or 524898 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 65611625 is about 8100.1003080209. The cubic root of 65611625 is about 403.3297569673.

The spelling of 65611625 in words is "sixty-five million, six hundred eleven thousand, six hundred twenty-five".