663412657 has 2 divisors, whose sum is σ = 663412658. Its totient is φ = 663412656.

The previous prime is 663412583. The next prime is 663412663. The reversal of 663412657 is 756214366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372914721 + 290497936 = 19311^2 + 17044^2 .

It is a cyclic number.

It is not a de Polignac number, because 663412657 - 2¹¹ = 663410609 is a prime.

It is not a weakly prime, because it can be changed into another prime (663482657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331706328 + 331706329.

It is an arithmetic number, because the mean of its divisors is an integer number (331706329).

Almost surely, 2^663412657 is an apocalyptic number.

It is an amenable number.

663412657 is a deficient number, since it is larger than the sum of its proper divisors (1).

663412657 is an equidigital number, since it uses as much as digits as its factorization.

663412657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The square root of 663412657 is about 25756.7982676419. The cubic root of 663412657 is about 872.1568263127.

It can be divided in two parts, 6634 and 12657, that added together give a palindrome (19291).

The spelling of 663412657 in words is "six hundred sixty-three million, four hundred twelve thousand, six hundred fifty-seven".