663477671 has 2 divisors, whose sum is σ = 663477672. Its totient is φ = 663477670.

The previous prime is 663477613. The next prime is 663477677. The reversal of 663477671 is 176774366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663477671 - 2¹⁰ = 663476647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663477677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331738835 + 331738836.

It is an arithmetic number, because the mean of its divisors is an integer number (331738836).

Almost surely, 2^663477671 is an apocalyptic number.

663477671 is a deficient number, since it is larger than the sum of its proper divisors (1).

663477671 is an equidigital number, since it uses as much as digits as its factorization.

663477671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 47.

The square root of 663477671 is about 25758.0603112890. The cubic root of 663477671 is about 872.1853156455.

The spelling of 663477671 in words is "six hundred sixty-three million, four hundred seventy-seven thousand, six hundred seventy-one".