66100000199 has 2 divisors, whose sum is σ = 66100000200. Its totient is φ = 66100000198.

The previous prime is 66100000171. The next prime is 66100000223. The reversal of 66100000199 is 99100000166.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66100000199 - 2²⁰ = 66098951623 is a prime.

66100000199 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66100000399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33050000099 + 33050000100.

It is an arithmetic number, because the mean of its divisors is an integer number (33050000100).

Almost surely, 2^66100000199 is an apocalyptic number.

66100000199 is a deficient number, since it is larger than the sum of its proper divisors (1).

66100000199 is an equidigital number, since it uses as much as digits as its factorization.

66100000199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 66100000199 in words is "sixty-six billion, one hundred million, one hundred ninety-nine", and thus it is an aban number.