67643334671305 has 4 divisors (see below), whose sum is σ = 81172001605572. Its totient is φ = 54114667737040.

The previous prime is 67643334671257. The next prime is 67643334671309. The reversal of 67643334671305 is 50317643334676.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29502137338569 + 38141197332736 = 5431587^2 + 6175856^2 .

It is a de Polignac number, because none of the positive numbers 2^k-67643334671305 is a prime.

It is a super-2 number, since 2×67643334671305² (a number of 28 digits) contains 22 as substring.

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 67643334671305.

It is not an unprimeable number, because it can be changed into a prime (67643334671309) 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, 6764333467126 + ... + 6764333467135.

It is an arithmetic number, because the mean of its divisors is an integer number (20293000401393).

Almost surely, 2^{67643334671305} is an apocalyptic number.

It is an amenable number.

67643334671305 is a deficient number, since it is larger than the sum of its proper divisors (13528666934267).

67643334671305 is a wasteful number, since it uses less digits than its factorization.

67643334671305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13528666934266.

The product of its (nonzero) digits is 68584320, while the sum is 58.

The spelling of 67643334671305 in words is "sixty-seven trillion, six hundred forty-three billion, three hundred thirty-four million, six hundred seventy-one thousand, three hundred five".