65928881 has 2 divisors, whose sum is σ = 65928882. Its totient is φ = 65928880.

The previous prime is 65928851. The next prime is 65928883. The reversal of 65928881 is 18882956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37210000 + 28718881 = 6100^2 + 5359^2 .

It is a cyclic number.

It is not a de Polignac number, because 65928881 - 2¹⁰ = 65927857 is a prime.

It is a super-2 number, since 2×65928881² = 8693234699824322, which contains 22 as substring.

Together with 65928883, 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 (65928883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32964440 + 32964441.

It is an arithmetic number, because the mean of its divisors is an integer number (32964441).

Almost surely, 2^65928881 is an apocalyptic number.

It is an amenable number.

65928881 is a deficient number, since it is larger than the sum of its proper divisors (1).

65928881 is an equidigital number, since it uses as much as digits as its factorization.

65928881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 47.

The square root of 65928881 is about 8119.6601529867. The cubic root of 65928881 is about 403.9787938580.

The spelling of 65928881 in words is "sixty-five million, nine hundred twenty-eight thousand, eight hundred eighty-one".