65649125 has 8 divisors (see below), whose sum is σ = 81930264. Its totient is φ = 52519200.

The previous prime is 65649113. The next prime is 65649151. The reversal of 65649125 is 52194656.

It can be written as a sum of positive squares in 4 ways, for example, as 894916 + 64754209 = 946^2 + 8047^2 .

It is not a de Polignac number, because 65649125 - 2¹² = 65645029 is a prime.

It is a super-2 number, since 2×65649125² = 8619615226531250, which contains 22 as substring.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 262472 + ... + 262721.

It is an arithmetic number, because the mean of its divisors is an integer number (10241283).

Almost surely, 2^65649125 is an apocalyptic number.

It is an amenable number.

65649125 is a deficient number, since it is larger than the sum of its proper divisors (16281139).

65649125 is an equidigital number, since it uses as much as digits as its factorization.

65649125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525208 (or 525198 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 65649125 is about 8102.4147635134. The cubic root of 65649125 is about 403.4065827091.

The spelling of 65649125 in words is "sixty-five million, six hundred forty-nine thousand, one hundred twenty-five".