65655839 has 2 divisors, whose sum is σ = 65655840. Its totient is φ = 65655838.

The previous prime is 65655829. The next prime is 65655841. The reversal of 65655839 is 93855656.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65655839 - 2¹² = 65651743 is a prime.

Together with 65655841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 65655793 and 65655802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65655829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32827919 + 32827920.

It is an arithmetic number, because the mean of its divisors is an integer number (32827920).

Almost surely, 2^65655839 is an apocalyptic number.

65655839 is a deficient number, since it is larger than the sum of its proper divisors (1).

65655839 is an equidigital number, since it uses as much as digits as its factorization.

65655839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 47.

The square root of 65655839 is about 8102.8290738482. The cubic root of 65655839 is about 403.4203345018.

The spelling of 65655839 in words is "sixty-five million, six hundred fifty-five thousand, eight hundred thirty-nine".