663965047 has 2 divisors, whose sum is σ = 663965048. Its totient is φ = 663965046.

The previous prime is 663964999. The next prime is 663965083. The reversal of 663965047 is 740569366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663965047 - 2⁷ = 663964919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663964988 and 663965006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663965647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331982523 + 331982524.

It is an arithmetic number, because the mean of its divisors is an integer number (331982524).

Almost surely, 2^663965047 is an apocalyptic number.

663965047 is a deficient number, since it is larger than the sum of its proper divisors (1).

663965047 is an equidigital number, since it uses as much as digits as its factorization.

663965047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 46.

The square root of 663965047 is about 25767.5192247915. The cubic root of 663965047 is about 872.3988260448.

The spelling of 663965047 in words is "six hundred sixty-three million, nine hundred sixty-five thousand, forty-seven".