77869608566 has 16 divisors (see below), whose sum is σ = 118793422800. Its totient is φ = 38271904128.

The previous prime is 77869608563. The next prime is 77869608581. The reversal of 77869608566 is 66580696877.

It is a junction number, because it is equal to n+sod(n) for n = 77869608496 and 77869608505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77869608563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2798450 + ... + 2826138.

It is an arithmetic number, because the mean of its divisors is an integer number (7424588925).

Almost surely, 2^77869608566 is an apocalyptic number.

77869608566 is a deficient number, since it is larger than the sum of its proper divisors (40923814234).

77869608566 is a wasteful number, since it uses less digits than its factorization.

77869608566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51583.

The product of its (nonzero) digits is 182891520, while the sum is 68.

The spelling of 77869608566 in words is "seventy-seven billion, eight hundred sixty-nine million, six hundred eight thousand, five hundred sixty-six".