663708543 has 16 divisors (see below), whose sum is σ = 967228416. Its totient is φ = 403009920.

The previous prime is 663708527. The next prime is 663708557. The reversal of 663708543 is 345807366.

It is not a de Polignac number, because 663708543 - 2⁴ = 663708527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663708495 and 663708504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663708503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208321 + ... + 211482.

It is an arithmetic number, because the mean of its divisors is an integer number (60451776).

Almost surely, 2^663708543 is an apocalyptic number.

663708543 is a deficient number, since it is larger than the sum of its proper divisors (303519873).

663708543 is a wasteful number, since it uses less digits than its factorization.

663708543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419854.

The product of its (nonzero) digits is 362880, while the sum is 42.

The square root of 663708543 is about 25762.5414701267. The cubic root of 663708543 is about 872.2864694221.

The spelling of 663708543 in words is "six hundred sixty-three million, seven hundred eight thousand, five hundred forty-three".