65681620025111 has 2 divisors, whose sum is σ = 65681620025112. Its totient is φ = 65681620025110.

The previous prime is 65681620025053. The next prime is 65681620025113. The reversal of 65681620025111 is 11152002618656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65681620025111 - 2²² = 65681615830807 is a prime.

It is a super-4 number, since 4×65681620025111⁴ (a number of 56 digits) contains 4444 as substring.

Together with 65681620025113, 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 (65681620025113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32840810012555 + 32840810012556.

It is an arithmetic number, because the mean of its divisors is an integer number (32840810012556).

Almost surely, 2^{65681620025111} is an apocalyptic number.

65681620025111 is a deficient number, since it is larger than the sum of its proper divisors (1).

65681620025111 is an equidigital number, since it uses as much as digits as its factorization.

65681620025111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 44.

The spelling of 65681620025111 in words is "sixty-five trillion, six hundred eighty-one billion, six hundred twenty million, twenty-five thousand, one hundred eleven".