67688072243 has 4 divisors (see below), whose sum is σ = 73841533368. Its totient is φ = 61534611120.

The previous prime is 67688072237. The next prime is 67688072251. The reversal of 67688072243 is 34227088676.

It is a happy number.

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 67688072243 - 2⁴ = 67688072227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67688072843) 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, 3076730546 + ... + 3076730567.

It is an arithmetic number, because the mean of its divisors is an integer number (18460383342).

Almost surely, 2^67688072243 is an apocalyptic number.

67688072243 is a deficient number, since it is larger than the sum of its proper divisors (6153461125).

67688072243 is a wasteful number, since it uses less digits than its factorization.

67688072243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6153461124.

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 67688072243 in words is "sixty-seven billion, six hundred eighty-eight million, seventy-two thousand, two hundred forty-three".