665433036543 has 48 divisors (see below), whose sum is σ = 1034647900160. Its totient is φ = 379057916160.

The previous prime is 665433036517. The next prime is 665433036551. The reversal of 665433036543 is 345630334566.

It is a happy number.

It is not a de Polignac number, because 665433036543 - 2⁶ = 665433036479 is a prime.

It is a super-2 number, since 2×665433036543² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665433036492 and 665433036501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665433036563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 496071 + ... + 1255767.

Almost surely, 2^665433036543 is an apocalyptic number.

665433036543 is a deficient number, since it is larger than the sum of its proper divisors (369214863617).

665433036543 is a wasteful number, since it uses less digits than its factorization.

665433036543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759868 (or 759857 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 48.

The spelling of 665433036543 in words is "six hundred sixty-five billion, four hundred thirty-three million, thirty-six thousand, five hundred forty-three".