78668377386687 has 12 divisors (see below), whose sum is σ = 123962291639784. Its totient is φ = 47677804476720.

The previous prime is 78668377386673. The next prime is 78668377386719.

78668377386687 is a `hidden beast` number, since 7 + 8 + 6 + 6 + 83 + 77 + 386 + 6 + 87 = 666.

78668377386687 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78668377386687 - 2¹⁵ = 78668377353919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78668377386597 and 78668377386606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78668377386607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 397315037208 + ... + 397315037405.

It is an arithmetic number, because the mean of its divisors is an integer number (10330190969982).

Almost surely, 2^{78668377386687} is an apocalyptic number.

78668377386687 is a deficient number, since it is larger than the sum of its proper divisors (45293914253097).

78668377386687 is a wasteful number, since it uses less digits than its factorization.

78668377386687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794630074630 (or 794630074627 counting only the distinct ones).

The product of its digits is 114709561344, while the sum is 90.

The spelling of 78668377386687 in words is "seventy-eight trillion, six hundred sixty-eight billion, three hundred seventy-seven million, three hundred eighty-six thousand, six hundred eighty-seven".