67966993791 has 6 divisors (see below), whose sum is σ = 98174546600. Its totient is φ = 45311329188.

The previous prime is 67966993741. The next prime is 67966993817. The reversal of 67966993791 is 19739966976.

It is not a de Polignac number, because 67966993791 - 2⁶ = 67966993727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67966993711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3775944091 + ... + 3775944108.

Almost surely, 2^67966993791 is an apocalyptic number.

67966993791 is a deficient number, since it is larger than the sum of its proper divisors (30207552809).

67966993791 is a wasteful number, since it uses less digits than its factorization.

67966993791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7551888205 (or 7551888202 counting only the distinct ones).

The product of its digits is 208324872, while the sum is 72.

The spelling of 67966993791 in words is "sixty-seven billion, nine hundred sixty-six million, nine hundred ninety-three thousand, seven hundred ninety-one".