66724573700 has 18 divisors (see below), whose sum is σ = 144792325146. Its totient is φ = 26689829440.

The previous prime is 66724573697. The next prime is 66724573723. The reversal of 66724573700 is 737542766.

It can be written as a sum of positive squares in 3 ways, for example, as 53202436 + 66671371264 = 7294^2 + 258208^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333622769 + ... + 333622968.

Almost surely, 2^66724573700 is an apocalyptic number.

It is an amenable number.

66724573700 is an abundant number, since it is smaller than the sum of its proper divisors (78067751446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66724573700 is a wasteful number, since it uses less digits than its factorization.

66724573700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667245751 (or 667245744 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 47.

The spelling of 66724573700 in words is "sixty-six billion, seven hundred twenty-four million, five hundred seventy-three thousand, seven hundred".