65688671 has 2 divisors, whose sum is σ = 65688672. Its totient is φ = 65688670.

The previous prime is 65688631. The next prime is 65688673. The reversal of 65688671 is 17688656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65688671 - 2¹⁴ = 65672287 is a prime.

Together with 65688673, 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 (65688673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32844335 + 32844336.

It is an arithmetic number, because the mean of its divisors is an integer number (32844336).

Almost surely, 2^65688671 is an apocalyptic number.

65688671 is a deficient number, since it is larger than the sum of its proper divisors (1).

65688671 is an equidigital number, since it uses as much as digits as its factorization.

65688671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 65688671 is about 8104.8547796984. The cubic root of 65688671 is about 403.4875683759.

It can be divided in two parts, 6568 and 8671, that multiplied together give a triangular number (56951128 = T₁₀₆₇₂).

The spelling of 65688671 in words is "sixty-five million, six hundred eighty-eight thousand, six hundred seventy-one".