5535665021 has 2 divisors, whose sum is σ = 5535665022. Its totient is φ = 5535665020.

The previous prime is 5535664999. The next prime is 5535665077. The reversal of 5535665021 is 1205665355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5533872100 + 1792921 = 74390^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 5535665021 - 2¹⁸ = 5535402877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5535665621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2767832510 + 2767832511.

It is an arithmetic number, because the mean of its divisors is an integer number (2767832511).

Almost surely, 2^5535665021 is an apocalyptic number.

It is an amenable number.

5535665021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5535665021 is an equidigital number, since it uses as much as digits as its factorization.

5535665021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 5535665021 is about 74402.0498440735. The cubic root of 5535665021 is about 1768.9814030367.

The spelling of 5535665021 in words is "five billion, five hundred thirty-five million, six hundred sixty-five thousand, twenty-one".