65855117 has 2 divisors, whose sum is σ = 65855118. Its totient is φ = 65855116.

The previous prime is 65855113. The next prime is 65855123. The reversal of 65855117 is 71155856.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62267881 + 3587236 = 7891^2 + 1894^2 .

It is a cyclic number.

It is not a de Polignac number, because 65855117 - 2² = 65855113 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65855113) 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 as a sum of consecutive naturals, namely, 32927558 + 32927559.

It is an arithmetic number, because the mean of its divisors is an integer number (32927559).

Almost surely, 2^65855117 is an apocalyptic number.

It is an amenable number.

65855117 is a deficient number, since it is larger than the sum of its proper divisors (1).

65855117 is an equidigital number, since it uses as much as digits as its factorization.

65855117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 38.

The square root of 65855117 is about 8115.1165734079. The cubic root of 65855117 is about 403.8280748220.

The spelling of 65855117 in words is "sixty-five million, eight hundred fifty-five thousand, one hundred seventeen".