663011243 has 2 divisors, whose sum is σ = 663011244. Its totient is φ = 663011242.

The previous prime is 663011231. The next prime is 663011263. The reversal of 663011243 is 342110366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663011243 - 2⁸ = 663010987 is a prime.

It is not a weakly prime, because it can be changed into another prime (663011263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331505621 + 331505622.

It is an arithmetic number, because the mean of its divisors is an integer number (331505622).

Almost surely, 2^663011243 is an apocalyptic number.

663011243 is a deficient number, since it is larger than the sum of its proper divisors (1).

663011243 is an equidigital number, since it uses as much as digits as its factorization.

663011243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 663011243 is about 25749.0046992112. The cubic root of 663011243 is about 871.9808842392.

The spelling of 663011243 in words is "six hundred sixty-three million, eleven thousand, two hundred forty-three".