768778877866 has 16 divisors (see below), whose sum is σ = 1161790156800. Its totient is φ = 381517043328.

The previous prime is 768778877851. The next prime is 768778877887. The reversal of 768778877866 is 668778877867.

It is a super-2 number, since 2×768778877866² (a number of 25 digits) contains 22 as substring.

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, 610170 + ... + 1381978.

It is an arithmetic number, because the mean of its divisors is an integer number (72611884800).

Almost surely, 2^768778877866 is an apocalyptic number.

768778877866 is a deficient number, since it is larger than the sum of its proper divisors (393011278934).

768778877866 is a wasteful number, since it uses less digits than its factorization.

768778877866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775533.

The product of its digits is 14869757952, while the sum is 85.

Subtracting from 768778877866 its reverse (668778877867), we obtain a palindrome (99999999999).

The spelling of 768778877866 in words is "seven hundred sixty-eight billion, seven hundred seventy-eight million, eight hundred seventy-seven thousand, eight hundred sixty-six".