16660327650677 has 2 divisors, whose sum is σ = 16660327650678. Its totient is φ = 16660327650676.

The previous prime is 16660327650643. The next prime is 16660327650739. The reversal of 16660327650677 is 77605672306661.

It is an a-pointer prime, because the next prime (16660327650739) can be obtained adding 16660327650677 to its sum of digits (62).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9788175503236 + 6872152147441 = 3128606^2 + 2621479^2 .

It is a cyclic number.

It is not a de Polignac number, because 16660327650677 - 2³⁰ = 16659253908853 is a prime.

It is a super-2 number, since 2×16660327650677² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16660327650077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330163825338 + 8330163825339.

It is an arithmetic number, because the mean of its divisors is an integer number (8330163825339).

Almost surely, 2^{16660327650677} is an apocalyptic number.

It is an amenable number.

16660327650677 is a deficient number, since it is larger than the sum of its proper divisors (1).

16660327650677 is an equidigital number, since it uses as much as digits as its factorization.

16660327650677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80015040, while the sum is 62.

The spelling of 16660327650677 in words is "sixteen trillion, six hundred sixty billion, three hundred twenty-seven million, six hundred fifty thousand, six hundred seventy-seven".