68706866887 has 4 divisors (see below), whose sum is σ = 70003222920. Its totient is φ = 67410510856.

The previous prime is 68706866869. The next prime is 68706866927. The reversal of 68706866887 is 78866860786.

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 68706866887 - 2⁷ = 68706866759 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 (68706866827) 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, 648177937 + ... + 648178042.

It is an arithmetic number, because the mean of its divisors is an integer number (17500805730).

Almost surely, 2^68706866887 is an apocalyptic number.

68706866887 is a deficient number, since it is larger than the sum of its proper divisors (1296356033).

68706866887 is a wasteful number, since it uses less digits than its factorization.

68706866887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296356032.

The product of its (nonzero) digits is 260112384, while the sum is 70.

The spelling of 68706866887 in words is "sixty-eight billion, seven hundred six million, eight hundred sixty-six thousand, eight hundred eighty-seven".