66550503436 has 12 divisors (see below), whose sum is σ = 118058770312. Its totient is φ = 32819426208.

The previous prime is 66550503431. The next prime is 66550503491. The reversal of 66550503436 is 63430505566.

66550503436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66550503392 and 66550503401.

It is not an unprimeable number, because it can be changed into a prime (66550503431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113956050 + ... + 113956633.

Almost surely, 2^66550503436 is an apocalyptic number.

It is an amenable number.

66550503436 is a deficient number, since it is larger than the sum of its proper divisors (51508266876).

66550503436 is a wasteful number, since it uses less digits than its factorization.

66550503436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227912760 (or 227912758 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 43.

The spelling of 66550503436 in words is "sixty-six billion, five hundred fifty million, five hundred three thousand, four hundred thirty-six".