68866455466887 has 32 divisors (see below), whose sum is σ = 99765145095168. Its totient is φ = 42002260425216.

The previous prime is 68866455466871. The next prime is 68866455466943. The reversal of 68866455466887 is 78866455466886.

It is not a de Polignac number, because 68866455466887 - 2⁴ = 68866455466871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68866455466807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92099718 + ... + 92844444.

It is an arithmetic number, because the mean of its divisors is an integer number (3117660784224).

Almost surely, 2^{68866455466887} is an apocalyptic number.

68866455466887 is a deficient number, since it is larger than the sum of its proper divisors (30898689628281).

68866455466887 is a wasteful number, since it uses less digits than its factorization.

68866455466887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765839.

The product of its digits is 89181388800, while the sum is 87.

Subtracting 68866455466887 from its reverse (78866455466886), we obtain a palindrome (9999999999999).

The spelling of 68866455466887 in words is "sixty-eight trillion, eight hundred sixty-six billion, four hundred fifty-five million, four hundred sixty-six thousand, eight hundred eighty-seven".