77665286223 has 18 divisors (see below), whose sum is σ = 128213013032. Its totient is φ = 44378899560.

The previous prime is 77665286219. The next prime is 77665286261. The reversal of 77665286223 is 32268256677.

77665286223 is a `hidden beast` number, since 7 + 7 + 6 + 6 + 5 + 2 + 8 + 622 + 3 = 666.

It is not a de Polignac number, because 77665286223 - 2² = 77665286219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77665286223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77665281223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2194438 + ... + 2229548.

Almost surely, 2^77665286223 is an apocalyptic number.

77665286223 is a deficient number, since it is larger than the sum of its proper divisors (50547726809).

77665286223 is an frugal number, since it uses more digits than its factorization.

77665286223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70235 (or 35121 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 54.

The spelling of 77665286223 in words is "seventy-seven billion, six hundred sixty-five million, two hundred eighty-six thousand, two hundred twenty-three".