65440517 has 2 divisors, whose sum is σ = 65440518. Its totient is φ = 65440516.

The previous prime is 65440513. The next prime is 65440547. The reversal of 65440517 is 71504456.

65440517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65383396 + 57121 = 8086^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 65440517 - 2² = 65440513 is a prime.

It is a super-2 number, since 2×65440517² = 8564922530454578, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65440511) 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 as a sum of consecutive naturals, namely, 32720258 + 32720259.

It is an arithmetic number, because the mean of its divisors is an integer number (32720259).

Almost surely, 2^65440517 is an apocalyptic number.

It is an amenable number.

65440517 is a deficient number, since it is larger than the sum of its proper divisors (1).

65440517 is an equidigital number, since it uses as much as digits as its factorization.

65440517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 65440517 is about 8089.5313214055. The cubic root of 65440517 is about 402.9788383209.

The spelling of 65440517 in words is "sixty-five million, four hundred forty thousand, five hundred seventeen".