66873554224 has 20 divisors (see below), whose sum is σ = 130825451536. Its totient is φ = 33112147392.

The previous prime is 66873554219. The next prime is 66873554227. The reversal of 66873554224 is 42245537866.

It is not an unprimeable number, because it can be changed into a prime (66873554227) 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, 20287659 + ... + 20290954.

Almost surely, 2^66873554224 is an apocalyptic number.

It is an amenable number.

66873554224 is a deficient number, since it is larger than the sum of its proper divisors (63951897312).

66873554224 is a wasteful number, since it uses less digits than its factorization.

66873554224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40578724 (or 40578718 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 52.

The spelling of 66873554224 in words is "sixty-six billion, eight hundred seventy-three million, five hundred fifty-four thousand, two hundred twenty-four".