67709139993 has 96 divisors (see below), whose sum is σ = 115376002560. Its totient is φ = 37828581120.

The previous prime is 67709139991. The next prime is 67709140021. The reversal of 67709139993 is 39993190776.

67709139993 is a `hidden beast` number, since 6 + 7 + 70 + 91 + 399 + 93 = 666.

It is not a de Polignac number, because 67709139993 - 2¹ = 67709139991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67709139993.

It is not an unprimeable number, because it can be changed into a prime (67709139991) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10457005 + ... + 10463477.

It is an arithmetic number, because the mean of its divisors is an integer number (1201833360).

Almost surely, 2^67709139993 is an apocalyptic number.

It is an amenable number.

67709139993 is a deficient number, since it is larger than the sum of its proper divisors (47666862567).

67709139993 is a wasteful number, since it uses less digits than its factorization.

67709139993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6659 (or 6656 counting only the distinct ones).

The product of its (nonzero) digits is 17360406, while the sum is 63.

It can be divided in two parts, 67709 and 139993, that added together give a palindrome (207702).

The spelling of 67709139993 in words is "sixty-seven billion, seven hundred nine million, one hundred thirty-nine thousand, nine hundred ninety-three".