663187079 has 2 divisors, whose sum is σ = 663187080. Its totient is φ = 663187078.

The previous prime is 663187009. The next prime is 663187087. The reversal of 663187079 is 970781366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663187079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663187009) 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, 331593539 + 331593540.

It is an arithmetic number, because the mean of its divisors is an integer number (331593540).

Almost surely, 2^663187079 is an apocalyptic number.

663187079 is a deficient number, since it is larger than the sum of its proper divisors (1).

663187079 is an equidigital number, since it uses as much as digits as its factorization.

663187079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 663187079 is about 25752.4188960960. The cubic root of 663187079 is about 872.0579629112.

The spelling of 663187079 in words is "six hundred sixty-three million, one hundred eighty-seven thousand, seventy-nine".