2633664221 has 2 divisors, whose sum is σ = 2633664222. Its totient is φ = 2633664220.

The previous prime is 2633664199. The next prime is 2633664227. The reversal of 2633664221 is 1224663362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1444380025 + 1189284196 = 38005^2 + 34486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2633664221 - 2¹⁸ = 2633402077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2633664227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1316832110 + 1316832111.

It is an arithmetic number, because the mean of its divisors is an integer number (1316832111).

Almost surely, 2^2633664221 is an apocalyptic number.

It is an amenable number.

2633664221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2633664221 is an equidigital number, since it uses as much as digits as its factorization.

2633664221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 35.

The square root of 2633664221 is about 51319.2383127419. The cubic root of 2633664221 is about 1380.9781311976.

The spelling of 2633664221 in words is "two billion, six hundred thirty-three million, six hundred sixty-four thousand, two hundred twenty-one".