77205422066687 has 12 divisors (see below), whose sum is σ = 78013998078744. Its totient is φ = 76404994404480.

The previous prime is 77205422066683. The next prime is 77205422066737. The reversal of 77205422066687 is 78666022450277.

It is not a de Polignac number, because 77205422066687 - 2² = 77205422066683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77205422066683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3708512 + ... + 12967802.

It is an arithmetic number, because the mean of its divisors is an integer number (6501166506562).

Almost surely, 2^{77205422066687} is an apocalyptic number.

77205422066687 is a deficient number, since it is larger than the sum of its proper divisors (808576012057).

77205422066687 is an equidigital number, since it uses as much as digits as its factorization.

77205422066687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9260170 (or 9260057 counting only the distinct ones).

The product of its (nonzero) digits is 94832640, while the sum is 62.

The spelling of 77205422066687 in words is "seventy-seven trillion, two hundred five billion, four hundred twenty-two million, sixty-six thousand, six hundred eighty-seven".