663041243 has 2 divisors, whose sum is σ = 663041244. Its totient is φ = 663041242.

The previous prime is 663041227. The next prime is 663041251. The reversal of 663041243 is 342140366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663041243 - 2⁴ = 663041227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (663041273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331520621 + 331520622.

It is an arithmetic number, because the mean of its divisors is an integer number (331520622).

Almost surely, 2^663041243 is an apocalyptic number.

663041243 is a deficient number, since it is larger than the sum of its proper divisors (1).

663041243 is an equidigital number, since it uses as much as digits as its factorization.

663041243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 663041243 is about 25749.5872394103. The cubic root of 663041243 is about 871.9940358674.

The spelling of 663041243 in words is "six hundred sixty-three million, forty-one thousand, two hundred forty-three".