663278463 has 28 divisors (see below), whose sum is σ = 1005734880. Its totient is φ = 437174496.

The previous prime is 663278453. The next prime is 663278471. The reversal of 663278463 is 364872366.

663278463 is a `hidden beast` number, since 6 + 632 + 7 + 8 + 4 + 6 + 3 = 666.

It is not a de Polignac number, because 663278463 - 2⁸ = 663278207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663278423) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 59770 + ... + 69992.

Almost surely, 2^663278463 is an apocalyptic number.

663278463 is a deficient number, since it is larger than the sum of its proper divisors (342456417).

663278463 is an equidigital number, since it uses as much as digits as its factorization.

663278463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10330 (or 10315 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

The square root of 663278463 is about 25754.1931149085. The cubic root of 663278463 is about 872.0980162070.

The spelling of 663278463 in words is "six hundred sixty-three million, two hundred seventy-eight thousand, four hundred sixty-three".