66266600400200 has 48 divisors (see below), whose sum is σ = 154134230598180. Its totient is φ = 26495563228160.

The previous prime is 66266600400139. The next prime is 66266600400257. The reversal of 66266600400200 is 200400666266.

It can be written as a sum of positive squares in 6 ways, for example, as 18853432938916 + 47413167461284 = 4342054^2 + 6885722^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68751029 + ... + 69708228.

Almost surely, 2^{66266600400200} is an apocalyptic number.

It is an amenable number.

66266600400200 is an abundant number, since it is smaller than the sum of its proper divisors (87867630197980).

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

66266600400200 is a wasteful number, since it uses less digits than its factorization.

66266600400200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138461666 (or 138461657 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 66266600400200 in words is "sixty-six trillion, two hundred sixty-six billion, six hundred million, four hundred thousand, two hundred".