77040704068 has 6 divisors (see below), whose sum is σ = 134821232126. Its totient is φ = 38520352032.

The previous prime is 77040704063. The next prime is 77040704129. The reversal of 77040704068 is 86040704077.

It can be written as a sum of positive squares in only one way, i.e., 51757160004 + 25283544064 = 227502^2 + 159008^2 .

It is not an unprimeable number, because it can be changed into a prime (77040704063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9630088005 + ... + 9630088012.

Almost surely, 2^77040704068 is an apocalyptic number.

It is an amenable number.

77040704068 is a deficient number, since it is larger than the sum of its proper divisors (57780528058).

77040704068 is a wasteful number, since it uses less digits than its factorization.

77040704068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19260176021 (or 19260176019 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 43.

Subtracting 77040704068 from its reverse (86040704077), we obtain a palindrome (9000000009).

The spelling of 77040704068 in words is "seventy-seven billion, forty million, seven hundred four thousand, sixty-eight".