66712006600 has 24 divisors (see below), whose sum is σ = 155105415810. Its totient is φ = 26684802560.

The previous prime is 66712006573. The next prime is 66712006601. The reversal of 66712006600 is 660021766.

66712006600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 28367317476 + 38344689124 = 168426^2 + 195818^2 .

It is not an unprimeable number, because it can be changed into a prime (66712006601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166779817 + ... + 166780216.

Almost surely, 2^66712006600 is an apocalyptic number.

It is an amenable number.

66712006600 is an abundant number, since it is smaller than the sum of its proper divisors (88393409210).

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

66712006600 is a wasteful number, since it uses less digits than its factorization.

66712006600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333560049 (or 333560040 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 66712006600 in words is "sixty-six billion, seven hundred twelve million, six thousand, six hundred".