77688868066 has 16 divisors (see below), whose sum is σ = 119254291200. Its totient is φ = 37937603088.

The previous prime is 77688868043. The next prime is 77688868073. The reversal of 77688868066 is 66086888677.

It is a junction number, because it is equal to n+sod(n) for n = 77688867986 and 77688868004.

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, 1079620 + ... + 1149328.

It is an arithmetic number, because the mean of its divisors is an integer number (7453393200).

Almost surely, 2^77688868066 is an apocalyptic number.

77688868066 is a deficient number, since it is larger than the sum of its proper divisors (41565423134).

77688868066 is a wasteful number, since it uses less digits than its factorization.

77688868066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82713.

The product of its (nonzero) digits is 260112384, while the sum is 70.

The spelling of 77688868066 in words is "seventy-seven billion, six hundred eighty-eight million, eight hundred sixty-eight thousand, sixty-six".