663511427 has 2 divisors, whose sum is σ = 663511428. Its totient is φ = 663511426.

The previous prime is 663511397. The next prime is 663511439. The reversal of 663511427 is 724115366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663511427 - 2²² = 659317123 is a prime.

It is equal to p_34459190 and since 663511427 and 34459190 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (663511127) 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, 331755713 + 331755714.

It is an arithmetic number, because the mean of its divisors is an integer number (331755714).

Almost surely, 2^663511427 is an apocalyptic number.

663511427 is a deficient number, since it is larger than the sum of its proper divisors (1).

663511427 is an equidigital number, since it uses as much as digits as its factorization.

663511427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 35.

The square root of 663511427 is about 25758.7155541576. The cubic root of 663511427 is about 872.2001068934.

The spelling of 663511427 in words is "six hundred sixty-three million, five hundred eleven thousand, four hundred twenty-seven".