663240042373 has 2 divisors, whose sum is σ = 663240042374. Its totient is φ = 663240042372.

The previous prime is 663240042349. The next prime is 663240042403. The reversal of 663240042373 is 373240042366.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 626198420929 + 37041621444 = 791327^2 + 192462^2 .

It is a cyclic number.

It is not a de Polignac number, because 663240042373 - 2¹³ = 663240034181 is a prime.

It is a super-2 number, since 2×663240042373² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663240012373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331620021186 + 331620021187.

It is an arithmetic number, because the mean of its divisors is an integer number (331620021187).

Almost surely, 2^663240042373 is an apocalyptic number.

It is an amenable number.

663240042373 is a deficient number, since it is larger than the sum of its proper divisors (1).

663240042373 is an equidigital number, since it uses as much as digits as its factorization.

663240042373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 40.

The spelling of 663240042373 in words is "six hundred sixty-three billion, two hundred forty million, forty-two thousand, three hundred seventy-three".