7780076780068 has 12 divisors (see below), whose sum is σ = 13637788503052. Its totient is φ = 3883565779200.

The previous prime is 7780076780057. The next prime is 7780076780071. The reversal of 7780076780068 is 8600876700877.

It can be written as a sum of positive squares in 2 ways, for example, as 4385078907364 + 3394997872704 = 2094058^2 + 1842552^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7780076779991 and 7780076780009.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1618150005 + ... + 1618154812.

Almost surely, 2^{7780076780068} is an apocalyptic number.

It is an amenable number.

7780076780068 is a deficient number, since it is larger than the sum of its proper divisors (5857711722984).

7780076780068 is a wasteful number, since it uses less digits than its factorization.

7780076780068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236305422 (or 3236305420 counting only the distinct ones).

The product of its (nonzero) digits is 44255232, while the sum is 64.

The spelling of 7780076780068 in words is "seven trillion, seven hundred eighty billion, seventy-six million, seven hundred eighty thousand, sixty-eight".