77771236320766 has 16 divisors (see below), whose sum is σ = 116758834925040. Its totient is φ = 38851636538880.

The previous prime is 77771236320763. The next prime is 77771236320773. The reversal of 77771236320766 is 66702363217777.

It is a junction number, because it is equal to n+sod(n) for n = 77771236320698 and 77771236320707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77771236320763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10165726 + ... + 16089886.

It is an arithmetic number, because the mean of its divisors is an integer number (7297427182815).

Almost surely, 2^{77771236320766} is an apocalyptic number.

77771236320766 is a deficient number, since it is larger than the sum of its proper divisors (38987598604274).

77771236320766 is a wasteful number, since it uses less digits than its factorization.

77771236320766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5929899.

The product of its (nonzero) digits is 130691232, while the sum is 64.

The spelling of 77771236320766 in words is "seventy-seven trillion, seven hundred seventy-one billion, two hundred thirty-six million, three hundred twenty thousand, seven hundred sixty-six".