663343983 has 24 divisors (see below), whose sum is σ = 1003032576. Its totient is φ = 421923600.

The previous prime is 663343969. The next prime is 663343991. The reversal of 663343983 is 389343366.

663343983 is a `hidden beast` number, since 6 + 633 + 4 + 3 + 9 + 8 + 3 = 666.

It is not a de Polignac number, because 663343983 - 2¹³ = 663335791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663303983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3066 + ... + 36552.

It is an arithmetic number, because the mean of its divisors is an integer number (41793024).

Almost surely, 2^663343983 is an apocalyptic number.

663343983 is a deficient number, since it is larger than the sum of its proper divisors (339688593).

663343983 is a wasteful number, since it uses less digits than its factorization.

663343983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33595 (or 33592 counting only the distinct ones).

The product of its digits is 839808, while the sum is 45.

The square root of 663343983 is about 25755.4651093705. The cubic root of 663343983 is about 872.1267311354.

The spelling of 663343983 in words is "six hundred sixty-three million, three hundred forty-three thousand, nine hundred eighty-three".