81336671347067 has 4 divisors (see below), whose sum is σ = 81337911546696. Its totient is φ = 81335431147440.

The previous prime is 81336671347039. The next prime is 81336671347079. The reversal of 81336671347067 is 76074317663318.

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

It is a cyclic number.

It is not a de Polignac number, because 81336671347067 - 2⁴⁴ = 63744485302651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81336671317067) 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, 620001434 + ... + 620132607.

It is an arithmetic number, because the mean of its divisors is an integer number (20334477886674).

Almost surely, 2^{81336671347067} is an apocalyptic number.

81336671347067 is a deficient number, since it is larger than the sum of its proper divisors (1240199629).

81336671347067 is a wasteful number, since it uses less digits than its factorization.

81336671347067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240199628.

The product of its (nonzero) digits is 64012032, while the sum is 62.

The spelling of 81336671347067 in words is "eighty-one trillion, three hundred thirty-six billion, six hundred seventy-one million, three hundred forty-seven thousand, sixty-seven".