2663940281 has 2 divisors, whose sum is σ = 2663940282. Its totient is φ = 2663940280.

The previous prime is 2663940259. The next prime is 2663940289. The reversal of 2663940281 is 1820493662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1348064656 + 1315875625 = 36716^2 + 36275^2 .

It is a cyclic number.

It is not a de Polignac number, because 2663940281 - 2¹⁴ = 2663923897 is a prime.

It is a super-2 number, since 2×2663940281² = 14193155641468717922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2663940289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1331970140 + 1331970141.

It is an arithmetic number, because the mean of its divisors is an integer number (1331970141).

Almost surely, 2^2663940281 is an apocalyptic number.

It is an amenable number.

2663940281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2663940281 is an equidigital number, since it uses as much as digits as its factorization.

2663940281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 2663940281 is about 51613.3730829521. The cubic root of 2663940281 is about 1386.2497949910.

The spelling of 2663940281 in words is "two billion, six hundred sixty-three million, nine hundred forty thousand, two hundred eighty-one".