65447890771 has 2 divisors, whose sum is σ = 65447890772. Its totient is φ = 65447890770.

The previous prime is 65447890769. The next prime is 65447890811. The reversal of 65447890771 is 17709874456.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65447890771 - 2¹ = 65447890769 is a prime.

Together with 65447890769, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65447840771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32723945385 + 32723945386.

It is an arithmetic number, because the mean of its divisors is an integer number (32723945386).

Almost surely, 2^65447890771 is an apocalyptic number.

65447890771 is a deficient number, since it is larger than the sum of its proper divisors (1).

65447890771 is an equidigital number, since it uses as much as digits as its factorization.

65447890771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11854080, while the sum is 58.

The spelling of 65447890771 in words is "sixty-five billion, four hundred forty-seven million, eight hundred ninety thousand, seven hundred seventy-one".