5388331661 has 2 divisors, whose sum is σ = 5388331662. Its totient is φ = 5388331660.

The previous prime is 5388331649. The next prime is 5388331691. The reversal of 5388331661 is 1661338835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5388294025 + 37636 = 73405^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 5388331661 - 2¹⁰ = 5388330637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5388331691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2694165830 + 2694165831.

It is an arithmetic number, because the mean of its divisors is an integer number (2694165831).

Almost surely, 2^5388331661 is an apocalyptic number.

It is an amenable number.

5388331661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5388331661 is an equidigital number, since it uses as much as digits as its factorization.

5388331661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 44.

The square root of 5388331661 is about 73405.2563581110. The cubic root of 5388331661 is about 1753.1460861069.

The spelling of 5388331661 in words is "five billion, three hundred eighty-eight million, three hundred thirty-one thousand, six hundred sixty-one".