65511671 has 2 divisors, whose sum is σ = 65511672. Its totient is φ = 65511670.

The previous prime is 65511647. The next prime is 65511679. The reversal of 65511671 is 17611556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65511671 - 2²² = 61317367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65511679) 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, 32755835 + 32755836.

It is an arithmetic number, because the mean of its divisors is an integer number (32755836).

Almost surely, 2^65511671 is an apocalyptic number.

65511671 is a deficient number, since it is larger than the sum of its proper divisors (1).

65511671 is an equidigital number, since it uses as much as digits as its factorization.

65511671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 32.

The square root of 65511671 is about 8093.9280327910. The cubic root of 65511671 is about 403.1248394607.

The spelling of 65511671 in words is "sixty-five million, five hundred eleven thousand, six hundred seventy-one".