65211611 has 2 divisors, whose sum is σ = 65211612. Its totient is φ = 65211610.

The previous prime is 65211581. The next prime is 65211613. The reversal of 65211611 is 11611256.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65211611 - 2⁶ = 65211547 is a prime.

Together with 65211613, 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 (65211613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32605805 + 32605806.

It is an arithmetic number, because the mean of its divisors is an integer number (32605806).

Almost surely, 2^65211611 is an apocalyptic number.

65211611 is a deficient number, since it is larger than the sum of its proper divisors (1).

65211611 is an equidigital number, since it uses as much as digits as its factorization.

65211611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 23.

The square root of 65211611 is about 8075.3706416486. The cubic root of 65211611 is about 402.5084261960.

Adding to 65211611 its reverse (11611256), we get a palindrome (76822867).

The spelling of 65211611 in words is "sixty-five million, two hundred eleven thousand, six hundred eleven".