663240042365 has 8 divisors (see below), whose sum is σ = 795979197240. Its totient is φ = 530531269632.

The previous prime is 663240042349. The next prime is 663240042373. The reversal of 663240042365 is 563240042366.

It can be written as a sum of positive squares in 4 ways, for example, as 9841036804 + 653399005561 = 99202^2 + 808331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 663240042365 - 2⁴ = 663240042349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7547480 + ... + 7634849.

It is an arithmetic number, because the mean of its divisors is an integer number (99497399655).

Almost surely, 2^663240042365 is an apocalyptic number.

It is an amenable number.

663240042365 is a deficient number, since it is larger than the sum of its proper divisors (132739154875).

663240042365 is a wasteful number, since it uses less digits than its factorization.

663240042365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15191071.

The product of its (nonzero) digits is 622080, while the sum is 41.

Subtracting from 663240042365 its reverse (563240042366), we obtain a palindrome (99999999999).

The spelling of 663240042365 in words is "six hundred sixty-three billion, two hundred forty million, forty-two thousand, three hundred sixty-five".