65216566770687 has 6 divisors (see below), whose sum is σ = 94201707557672. Its totient is φ = 43477711180452.

The previous prime is 65216566770661. The next prime is 65216566770689. The reversal of 65216566770687 is 78607766561256.

It is a happy number.

65216566770687 is a `hidden beast` number, since 6 + 52 + 1 + 6 + 566 + 7 + 7 + 0 + 6 + 8 + 7 = 666.

It is not a de Polignac number, because 65216566770687 - 2⁶ = 65216566770623 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 (65216566770689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3623142598363 + ... + 3623142598380.

Almost surely, 2^{65216566770687} is an apocalyptic number.

65216566770687 is a deficient number, since it is larger than the sum of its proper divisors (28985140786985).

65216566770687 is a wasteful number, since it uses less digits than its factorization.

65216566770687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7246285196749 (or 7246285196746 counting only the distinct ones).

The product of its (nonzero) digits is 1066867200, while the sum is 72.

The spelling of 65216566770687 in words is "sixty-five trillion, two hundred sixteen billion, five hundred sixty-six million, seven hundred seventy thousand, six hundred eighty-seven".