663487471 has 2 divisors, whose sum is σ = 663487472. Its totient is φ = 663487470.

The previous prime is 663487459. The next prime is 663487477. The reversal of 663487471 is 174784366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663487471 - 2⁵ = 663487439 is a prime.

It is a super-3 number, since 3×663487471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663487477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331743735 + 331743736.

It is an arithmetic number, because the mean of its divisors is an integer number (331743736).

Almost surely, 2^663487471 is an apocalyptic number.

663487471 is a deficient number, since it is larger than the sum of its proper divisors (1).

663487471 is an equidigital number, since it uses as much as digits as its factorization.

663487471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 46.

The square root of 663487471 is about 25758.2505423020. The cubic root of 663487471 is about 872.1896098739.

The spelling of 663487471 in words is "six hundred sixty-three million, four hundred eighty-seven thousand, four hundred seventy-one".