663431134357 has 2 divisors, whose sum is σ = 663431134358. Its totient is φ = 663431134356.

The previous prime is 663431134349. The next prime is 663431134381. The reversal of 663431134357 is 753431134366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538618016836 + 124813117521 = 733906^2 + 353289^2 .

It is a cyclic number.

It is not a de Polignac number, because 663431134357 - 2³ = 663431134349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663431134057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331715567178 + 331715567179.

It is an arithmetic number, because the mean of its divisors is an integer number (331715567179).

Almost surely, 2^663431134357 is an apocalyptic number.

It is an amenable number.

663431134357 is a deficient number, since it is larger than the sum of its proper divisors (1).

663431134357 is an equidigital number, since it uses as much as digits as its factorization.

663431134357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 46.

Subtracting 663431134357 from its reverse (753431134366), we obtain a palindrome (90000000009).

The spelling of 663431134357 in words is "six hundred sixty-three billion, four hundred thirty-one million, one hundred thirty-four thousand, three hundred fifty-seven".