68766689382978 has 16 divisors (see below), whose sum is σ = 137580174779040. Its totient is φ = 22914430458816.

The previous prime is 68766689382961. The next prime is 68766689383043. The reversal of 68766689382978 is 87928398666786.

It is a happy number.

It is a super-2 number, since 2×68766689382978² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68766689382891 and 68766689382900.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1949814775 + ... + 1949850042.

It is an arithmetic number, because the mean of its divisors is an integer number (8598760923690).

Almost surely, 2^{68766689382978} is an apocalyptic number.

68766689382978 is an abundant number, since it is smaller than the sum of its proper divisors (68813485396062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68766689382978 is a wasteful number, since it uses less digits than its factorization.

68766689382978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899667761.

The product of its digits is 126414618624, while the sum is 93.

The spelling of 68766689382978 in words is "sixty-eight trillion, seven hundred sixty-six billion, six hundred eighty-nine million, three hundred eighty-two thousand, nine hundred seventy-eight".