66722433700 has 54 divisors (see below), whose sum is σ = 156781966614. Its totient is φ = 24635969280.

The previous prime is 66722433691. The next prime is 66722433721. The reversal of 66722433700 is 733422766.

It can be written as a sum of positive squares in 9 ways, for example, as 49836990564 + 16885443136 = 223242^2 + 129944^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1957137 + ... + 1990936.

Almost surely, 2^66722433700 is an apocalyptic number.

It is an amenable number.

66722433700 is an abundant number, since it is smaller than the sum of its proper divisors (90059532914).

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

66722433700 is a wasteful number, since it uses less digits than its factorization.

66722433700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948113 (or 3948093 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 40.

The spelling of 66722433700 in words is "sixty-six billion, seven hundred twenty-two million, four hundred thirty-three thousand, seven hundred".