77117337486866 has 8 divisors (see below), whose sum is σ = 115685352313020. Its totient is φ = 38555553382528.

The previous prime is 77117337486829. The next prime is 77117337486901. The reversal of 77117337486866 is 66868473371177.

It can be written as a sum of positive squares in 2 ways, for example, as 69890084880841 + 7227252606025 = 8360029^2 + 2688355^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 77117337486793 and 77117337486802.

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, 1557649511 + ... + 1557699018.

Almost surely, 2^{77117337486866} is an apocalyptic number.

77117337486866 is a deficient number, since it is larger than the sum of its proper divisors (38568014826154).

77117337486866 is a wasteful number, since it uses less digits than its factorization.

77117337486866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115360908.

The product of its digits is 1194891264, while the sum is 74.

The spelling of 77117337486866 in words is "seventy-seven trillion, one hundred seventeen billion, three hundred thirty-seven million, four hundred eighty-six thousand, eight hundred sixty-six".