66200243489691 has 64 divisors (see below), whose sum is σ = 90624199680000. Its totient is φ = 42971145235200.

The previous prime is 66200243489683. The next prime is 66200243489753. The reversal of 66200243489691 is 19698434200266.

It is not a de Polignac number, because 66200243489691 - 2³ = 66200243489683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66200243489671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15257025600 + ... + 15257029938.

It is an arithmetic number, because the mean of its divisors is an integer number (1416003120000).

Almost surely, 2^{66200243489691} is an apocalyptic number.

66200243489691 is a deficient number, since it is larger than the sum of its proper divisors (24423956190309).

66200243489691 is a wasteful number, since it uses less digits than its factorization.

66200243489691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6104.

The product of its (nonzero) digits is 26873856, while the sum is 60.

The spelling of 66200243489691 in words is "sixty-six trillion, two hundred billion, two hundred forty-three million, four hundred eighty-nine thousand, six hundred ninety-one".