65421611 has 2 divisors, whose sum is σ = 65421612. Its totient is φ = 65421610.

The previous prime is 65421571. The next prime is 65421613. The reversal of 65421611 is 11612456.

65421611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65421611 - 2¹⁴ = 65405227 is a prime.

Together with 65421613, 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 (65421613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32710805 + 32710806.

It is an arithmetic number, because the mean of its divisors is an integer number (32710806).

Almost surely, 2^65421611 is an apocalyptic number.

65421611 is a deficient number, since it is larger than the sum of its proper divisors (1).

65421611 is an equidigital number, since it uses as much as digits as its factorization.

65421611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 65421611 is about 8088.3626896919. The cubic root of 65421611 is about 402.9400272394.

The spelling of 65421611 in words is "sixty-five million, four hundred twenty-one thousand, six hundred eleven".