663159551 has 2 divisors, whose sum is σ = 663159552. Its totient is φ = 663159550.

The previous prime is 663159517. The next prime is 663159577. The reversal of 663159551 is 155951366.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663159551 - 2¹⁰ = 663158527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663159499 and 663159508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663159151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331579775 + 331579776.

It is an arithmetic number, because the mean of its divisors is an integer number (331579776).

Almost surely, 2^663159551 is an apocalyptic number.

663159551 is a deficient number, since it is larger than the sum of its proper divisors (1).

663159551 is an equidigital number, since it uses as much as digits as its factorization.

663159551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121500, while the sum is 41.

The square root of 663159551 is about 25751.8844164849. The cubic root of 663159551 is about 872.0458967615.

The spelling of 663159551 in words is "six hundred sixty-three million, one hundred fifty-nine thousand, five hundred fifty-one".