65881007 has 2 divisors, whose sum is σ = 65881008. Its totient is φ = 65881006.

The previous prime is 65880977. The next prime is 65881009. The reversal of 65881007 is 70018856.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65881007 - 2¹² = 65876911 is a prime.

Together with 65881009, 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 (65881009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32940503 + 32940504.

It is an arithmetic number, because the mean of its divisors is an integer number (32940504).

Almost surely, 2^65881007 is an apocalyptic number.

65881007 is a deficient number, since it is larger than the sum of its proper divisors (1).

65881007 is an equidigital number, since it uses as much as digits as its factorization.

65881007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 65881007 is about 8116.7115878291. The cubic root of 65881007 is about 403.8809876380.

The spelling of 65881007 in words is "sixty-five million, eight hundred eighty-one thousand, seven".