65716247 has 4 divisors (see below), whose sum is σ = 65758896. Its totient is φ = 65673600.

The previous prime is 65716223. The next prime is 65716253. The reversal of 65716247 is 74261756.

65716247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65716247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65716247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65716207) 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 in 3 ways as a sum of consecutive naturals, for example, 18923 + ... + 22124.

It is an arithmetic number, because the mean of its divisors is an integer number (16439724).

Almost surely, 2^65716247 is an apocalyptic number.

65716247 is a deficient number, since it is larger than the sum of its proper divisors (42649).

65716247 is a wasteful number, since it uses less digits than its factorization.

65716247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42648.

The product of its digits is 70560, while the sum is 38.

The square root of 65716247 is about 8106.5558037924. Note that the first 3 decimals coincide. The cubic root of 65716247 is about 403.5440216243.

The spelling of 65716247 in words is "sixty-five million, seven hundred sixteen thousand, two hundred forty-seven".