68777806687 has 8 divisors (see below), whose sum is σ = 69041300000. Its totient is φ = 68514423264.

The previous prime is 68777806679. The next prime is 68777806793. The reversal of 68777806687 is 78660877786.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68777806687 - 2³ = 68777806679 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 (68777806667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359889 + ... + 1409557.

It is an arithmetic number, because the mean of its divisors is an integer number (8630162500).

Almost surely, 2^68777806687 is an apocalyptic number.

68777806687 is a deficient number, since it is larger than the sum of its proper divisors (263493313).

68777806687 is a wasteful number, since it uses less digits than its factorization.

68777806687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54945.

The product of its (nonzero) digits is 265531392, while the sum is 70.

The spelling of 68777806687 in words is "sixty-eight billion, seven hundred seventy-seven million, eight hundred six thousand, six hundred eighty-seven".