65705747 has 4 divisors (see below), whose sum is σ = 67481616. Its totient is φ = 63929880.

The previous prime is 65705713. The next prime is 65705753. The reversal of 65705747 is 74750756.

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

It is a cyclic number.

It is not a de Polignac number, because 65705747 - 2⁶ = 65705683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65705707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887879 + ... + 887952.

It is an arithmetic number, because the mean of its divisors is an integer number (16870404).

Almost surely, 2^65705747 is an apocalyptic number.

65705747 is a deficient number, since it is larger than the sum of its proper divisors (1775869).

65705747 is a wasteful number, since it uses less digits than its factorization.

65705747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775868.

The product of its (nonzero) digits is 205800, while the sum is 41.

The square root of 65705747 is about 8105.9081539332. The cubic root of 65705747 is about 403.5225280154.

The spelling of 65705747 in words is "sixty-five million, seven hundred five thousand, seven hundred forty-seven".