327743137000661 has 2 divisors, whose sum is σ = 327743137000662. Its totient is φ = 327743137000660.

The previous prime is 327743137000651. The next prime is 327743137000711. The reversal of 327743137000661 is 166000731347723.

It is an a-pointer prime, because the next prime (327743137000711) can be obtained adding 327743137000661 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255257818704100 + 72485318296561 = 15976790^2 + 8513831^2 .

It is a cyclic number.

It is not a de Polignac number, because 327743137000661 - 2⁶ = 327743137000597 is a prime.

It is a super-2 number, since 2×327743137000661² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (327743137000621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163871568500330 + 163871568500331.

It is an arithmetic number, because the mean of its divisors is an integer number (163871568500331).

Almost surely, 2^{327743137000661} is an apocalyptic number.

It is an amenable number.

327743137000661 is a deficient number, since it is larger than the sum of its proper divisors (1).

327743137000661 is an equidigital number, since it uses as much as digits as its factorization.

327743137000661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2667168, while the sum is 50.

The spelling of 327743137000661 in words is "three hundred twenty-seven trillion, seven hundred forty-three billion, one hundred thirty-seven million, six hundred sixty-one", and thus it is an aban number.