77766113834884 has 6 divisors (see below), whose sum is σ = 136090699211054. Its totient is φ = 38883056917440.

The previous prime is 77766113834881. The next prime is 77766113834891. The reversal of 77766113834884 is 48843831166777.

It can be written as a sum of positive squares in only one way, i.e., 40632592896900 + 37133520937984 = 6374370^2 + 6093728^2 .

It is not an unprimeable number, because it can be changed into a prime (77766113834881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9720764229357 + ... + 9720764229364.

Almost surely, 2^{77766113834884} is an apocalyptic number.

It is an amenable number.

77766113834884 is a deficient number, since it is larger than the sum of its proper divisors (58324585376170).

77766113834884 is a wasteful number, since it uses less digits than its factorization.

77766113834884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19441528458725 (or 19441528458723 counting only the distinct ones).

The product of its digits is 910393344, while the sum is 73.

The spelling of 77766113834884 in words is "seventy-seven trillion, seven hundred sixty-six billion, one hundred thirteen million, eight hundred thirty-four thousand, eight hundred eighty-four".