67736320673 has 4 divisors (see below), whose sum is σ = 77412937920. Its totient is φ = 58059703428.

The previous prime is 67736320669. The next prime is 67736320721. The reversal of 67736320673 is 37602363776.

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 67736320673 - 2² = 67736320669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67736320273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4838308613 + ... + 4838308626.

It is an arithmetic number, because the mean of its divisors is an integer number (19353234480).

Almost surely, 2^67736320673 is an apocalyptic number.

It is an amenable number.

67736320673 is a deficient number, since it is larger than the sum of its proper divisors (9676617247).

67736320673 is an equidigital number, since it uses as much as digits as its factorization.

67736320673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9676617246.

The product of its (nonzero) digits is 4000752, while the sum is 50.

The spelling of 67736320673 in words is "sixty-seven billion, seven hundred thirty-six million, three hundred twenty thousand, six hundred seventy-three".