5547327661 has 2 divisors, whose sum is σ = 5547327662. Its totient is φ = 5547327660.

The previous prime is 5547327649. The next prime is 5547327671. The reversal of 5547327661 is 1667237455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5162422500 + 384905161 = 71850^2 + 19619^2 .

It is a cyclic number.

It is not a de Polignac number, because 5547327661 - 2¹⁹ = 5546803373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5547327631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2773663830 + 2773663831.

It is an arithmetic number, because the mean of its divisors is an integer number (2773663831).

Almost surely, 2^5547327661 is an apocalyptic number.

It is an amenable number.

5547327661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5547327661 is an equidigital number, since it uses as much as digits as its factorization.

5547327661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 46.

The square root of 5547327661 is about 74480.3844042175. The cubic root of 5547327661 is about 1770.2228390425. Note that the first 3 decimals are identical.

The spelling of 5547327661 in words is "five billion, five hundred forty-seven million, three hundred twenty-seven thousand, six hundred sixty-one".