663357997 has 2 divisors, whose sum is σ = 663357998. Its totient is φ = 663357996.

The previous prime is 663357979. The next prime is 663358009. The reversal of 663357997 is 799753366.

Together with previous prime (663357979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 637764516 + 25593481 = 25254^2 + 5059^2 .

It is a cyclic number.

It is not a de Polignac number, because 663357997 - 2¹⁹ = 662833709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663357917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331678998 + 331678999.

It is an arithmetic number, because the mean of its divisors is an integer number (331678999).

Almost surely, 2^663357997 is an apocalyptic number.

It is an amenable number.

663357997 is a deficient number, since it is larger than the sum of its proper divisors (1).

663357997 is an equidigital number, since it uses as much as digits as its factorization.

663357997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6429780, while the sum is 55.

The square root of 663357997 is about 25755.7371666974. The cubic root of 663357997 is about 872.1328726940.

The spelling of 663357997 in words is "six hundred sixty-three million, three hundred fifty-seven thousand, nine hundred ninety-seven".