66517066163277 has 12 divisors (see below), whose sum is σ = 98423626355964. Its totient is φ = 43263132463680.

The previous prime is 66517066163267. The next prime is 66517066163311. The reversal of 66517066163277 is 77236166071566.

It is a happy number.

66517066163277 is a `hidden beast` number, since 6 + 6 + 5 + 1 + 7 + 0 + 6 + 616 + 3 + 2 + 7 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32659784835876 + 33857281327401 = 5714874^2 + 5818701^2 .

It is not a de Polignac number, because 66517066163277 - 2⁸ = 66517066163021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66517066163267) 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, 90131525598 + ... + 90131526335.

It is an arithmetic number, because the mean of its divisors is an integer number (8201968862997).

Almost surely, 2^{66517066163277} is an apocalyptic number.

It is an amenable number.

66517066163277 is a deficient number, since it is larger than the sum of its proper divisors (31906560192687).

66517066163277 is a wasteful number, since it uses less digits than its factorization.

66517066163277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180263051980 (or 180263051977 counting only the distinct ones).

The product of its (nonzero) digits is 80015040, while the sum is 63.

The spelling of 66517066163277 in words is "sixty-six trillion, five hundred seventeen billion, sixty-six million, one hundred sixty-three thousand, two hundred seventy-seven".