663240042349 has 2 divisors, whose sum is σ = 663240042350. Its totient is φ = 663240042348.

The previous prime is 663240042301. The next prime is 663240042373. The reversal of 663240042349 is 943240042366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587741489449 + 75498552900 = 766643^2 + 274770^2 .

It is a cyclic number.

It is not a de Polignac number, because 663240042349 - 2²⁵ = 663206487917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663240046349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331620021174 + 331620021175.

It is an arithmetic number, because the mean of its divisors is an integer number (331620021175).

Almost surely, 2^663240042349 is an apocalyptic number.

It is an amenable number.

663240042349 is a deficient number, since it is larger than the sum of its proper divisors (1).

663240042349 is an equidigital number, since it uses as much as digits as its factorization.

663240042349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 43.

The spelling of 663240042349 in words is "six hundred sixty-three billion, two hundred forty million, forty-two thousand, three hundred forty-nine".