663835473 has 32 divisors (see below), whose sum is σ = 1147883520. Its totient is φ = 371258640.

The previous prime is 663835451. The next prime is 663835481. The reversal of 663835473 is 374538366.

663835473 is a `hidden beast` number, since 6 + 638 + 3 + 5 + 4 + 7 + 3 = 666.

It is not a de Polignac number, because 663835473 - 2⁸ = 663835217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663835483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28483 + ... + 46248.

It is an arithmetic number, because the mean of its divisors is an integer number (35871360).

Almost surely, 2^663835473 is an apocalyptic number.

663835473 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

663835473 is a deficient number, since it is larger than the sum of its proper divisors (484048047).

663835473 is a wasteful number, since it uses less digits than its factorization.

663835473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74794 (or 74788 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 663835473 is about 25765.0048127300. The cubic root of 663835473 is about 872.3420722744.

The spelling of 663835473 in words is "six hundred sixty-three million, eight hundred thirty-five thousand, four hundred seventy-three".