66765414317 has 4 divisors (see below), whose sum is σ = 76303330656. Its totient is φ = 57227497980.

The previous prime is 66765414293. The next prime is 66765414361. The reversal of 66765414317 is 71341456766.

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 66765414317 - 2¹⁸ = 66765152173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66765404317) 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 3 ways as a sum of consecutive naturals, for example, 4768958159 + ... + 4768958172.

It is an arithmetic number, because the mean of its divisors is an integer number (19075832664).

Almost surely, 2^66765414317 is an apocalyptic number.

It is an amenable number.

66765414317 is a deficient number, since it is larger than the sum of its proper divisors (9537916339).

66765414317 is an equidigital number, since it uses as much as digits as its factorization.

66765414317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9537916338.

The product of its digits is 2540160, while the sum is 50.

The spelling of 66765414317 in words is "sixty-six billion, seven hundred sixty-five million, four hundred fourteen thousand, three hundred seventeen".