65668716008633 has 4 divisors (see below), whose sum is σ = 65669250775440. Its totient is φ = 65668181241828.

The previous prime is 65668716008587. The next prime is 65668716008839. The reversal of 65668716008633 is 33680061786656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65668716008633 - 2¹⁶ = 65668715943097 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 65668716008633.

It is not an unprimeable number, because it can be changed into a prime (65668716002633) 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, 267199163 + ... + 267444816.

It is an arithmetic number, because the mean of its divisors is an integer number (16417312693860).

Almost surely, 2^{65668716008633} is an apocalyptic number.

It is an amenable number.

65668716008633 is a deficient number, since it is larger than the sum of its proper divisors (534766807).

65668716008633 is a wasteful number, since it uses less digits than its factorization.

65668716008633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534766806.

The product of its (nonzero) digits is 156764160, while the sum is 65.

The spelling of 65668716008633 in words is "sixty-five trillion, six hundred sixty-eight billion, seven hundred sixteen million, eight thousand, six hundred thirty-three".