65730424561 has 8 divisors (see below), whose sum is σ = 66181343400. Its totient is φ = 65279636352.

The previous prime is 65730424553. The next prime is 65730424579. The reversal of 65730424561 is 16542403756.

It can be written as a sum of positive squares in 4 ways, for example, as 2475659536 + 63254765025 = 49756^2 + 251505^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65730424561 - 2³ = 65730424553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65730427561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1114531 + ... + 1172023.

It is an arithmetic number, because the mean of its divisors is an integer number (8272667925).

Almost surely, 2^65730424561 is an apocalyptic number.

It is an amenable number.

65730424561 is a deficient number, since it is larger than the sum of its proper divisors (450918839).

65730424561 is a wasteful number, since it uses less digits than its factorization.

65730424561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65315.

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 65730424561 in words is "sixty-five billion, seven hundred thirty million, four hundred twenty-four thousand, five hundred sixty-one".