85660361 has 2 divisors, whose sum is σ = 85660362. Its totient is φ = 85660360.

The previous prime is 85660327. The next prime is 85660363. The reversal of 85660361 is 16306658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56715961 + 28944400 = 7531^2 + 5380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85660361 is a prime.

Together with 85660363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85660363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42830180 + 42830181.

It is an arithmetic number, because the mean of its divisors is an integer number (42830181).

Almost surely, 2^85660361 is an apocalyptic number.

It is an amenable number.

85660361 is a deficient number, since it is larger than the sum of its proper divisors (1).

85660361 is an equidigital number, since it uses as much as digits as its factorization.

85660361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 85660361 is about 9255.2882721177. The cubic root of 85660361 is about 440.8186566615.

The spelling of 85660361 in words is "eighty-five million, six hundred sixty thousand, three hundred sixty-one".