65516249 has 8 divisors (see below), whose sum is σ = 71762760. Its totient is φ = 59535616.

The previous prime is 65516203. The next prime is 65516251. The reversal of 65516249 is 94261556.

It can be written as a sum of positive squares in 4 ways, for example, as 35485849 + 30030400 = 5957^2 + 5480^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65516249 - 2¹⁶ = 65450713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65516149) by changing a digit.

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, 65954 + ... + 66939.

It is an arithmetic number, because the mean of its divisors is an integer number (8970345).

Almost surely, 2^65516249 is an apocalyptic number.

It is an amenable number.

65516249 is a deficient number, since it is larger than the sum of its proper divisors (6246511).

65516249 is a wasteful number, since it uses less digits than its factorization.

65516249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132939.

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

The square root of 65516249 is about 8094.2108324407. The cubic root of 65516249 is about 403.1342294544.

The spelling of 65516249 in words is "sixty-five million, five hundred sixteen thousand, two hundred forty-nine".