66212377317 has 12 divisors (see below), whose sum is σ = 99182326880. Its totient is φ = 44141584716.

The previous prime is 66212377313. The next prime is 66212377331. The reversal of 66212377317 is 71377321266.

66212377317 is a `hidden beast` number, since 6 + 621 + 2 + 3 + 7 + 7 + 3 + 17 = 666.

It is not a de Polignac number, because 66212377317 - 2² = 66212377313 is a prime.

It is a super-2 number, since 2×66212377317² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66212377313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136239217 + ... + 136239702.

Almost surely, 2^66212377317 is an apocalyptic number.

It is an amenable number.

66212377317 is a deficient number, since it is larger than the sum of its proper divisors (32969949563).

66212377317 is an equidigital number, since it uses as much as digits as its factorization.

66212377317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272478934 (or 272478922 counting only the distinct ones).

The product of its digits is 444528, while the sum is 45.

The spelling of 66212377317 in words is "sixty-six billion, two hundred twelve million, three hundred seventy-seven thousand, three hundred seventeen".