68688006806 has 4 divisors (see below), whose sum is σ = 103032010212. Its totient is φ = 34344003402.

The previous prime is 68688006781. The next prime is 68688006809. The reversal of 68688006806 is 60860088686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60860088686 = 2 ⋅30430044343.

It is a super-2 number, since 2×68688006806² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68688006809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17172001700 + ... + 17172001703.

It is an arithmetic number, because the mean of its divisors is an integer number (25758002553).

Almost surely, 2^68688006806 is an apocalyptic number.

68688006806 is a deficient number, since it is larger than the sum of its proper divisors (34344003406).

68688006806 is a wasteful number, since it uses less digits than its factorization.

68688006806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34344003405.

The product of its (nonzero) digits is 5308416, while the sum is 56.

The spelling of 68688006806 in words is "sixty-eight billion, six hundred eighty-eight million, six thousand, eight hundred six".