65888861 has 2 divisors, whose sum is σ = 65888862. Its totient is φ = 65888860.

The previous prime is 65888839. The next prime is 65888863. The reversal of 65888861 is 16888856.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57002500 + 8886361 = 7550^2 + 2981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65888861 is a prime.

Together with 65888863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65888863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32944430 + 32944431.

It is an arithmetic number, because the mean of its divisors is an integer number (32944431).

Almost surely, 2^65888861 is an apocalyptic number.

It is an amenable number.

65888861 is a deficient number, since it is larger than the sum of its proper divisors (1).

65888861 is an equidigital number, since it uses as much as digits as its factorization.

65888861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 737280, while the sum is 50.

The square root of 65888861 is about 8117.1953900347. The cubic root of 65888861 is about 403.8970365489.

The spelling of 65888861 in words is "sixty-five million, eight hundred eighty-eight thousand, eight hundred sixty-one".