65724647 has 2 divisors, whose sum is σ = 65724648. Its totient is φ = 65724646.

The previous prime is 65724613. The next prime is 65724649. The reversal of 65724647 is 74642756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65724647 - 2⁶ = 65724583 is a prime.

Together with 65724649, 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 (65724649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32862323 + 32862324.

It is an arithmetic number, because the mean of its divisors is an integer number (32862324).

Almost surely, 2^65724647 is an apocalyptic number.

65724647 is a deficient number, since it is larger than the sum of its proper divisors (1).

65724647 is an equidigital number, since it uses as much as digits as its factorization.

65724647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 41.

The square root of 65724647 is about 8107.0738864278. The cubic root of 65724647 is about 403.5612148630.

The spelling of 65724647 in words is "sixty-five million, seven hundred twenty-four thousand, six hundred forty-seven".