66600724180 has 48 divisors (see below), whose sum is σ = 145979656704. Its totient is φ = 25475521280.

The previous prime is 66600724121. The next prime is 66600724189. The reversal of 66600724180 is 8142700666.

It is a super-2 number, since 2×66600724180² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66600724189) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2036760 + ... + 2069200.

It is an arithmetic number, because the mean of its divisors is an integer number (3041242848).

Almost surely, 2^66600724180 is an apocalyptic number.

It is an amenable number.

66600724180 is an abundant number, since it is smaller than the sum of its proper divisors (79378932524).

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

66600724180 is a wasteful number, since it uses less digits than its factorization.

66600724180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36936 (or 36934 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 66600724180 in words is "sixty-six billion, six hundred million, seven hundred twenty-four thousand, one hundred eighty".