1666129098195 has 24 divisors (see below), whose sum is σ = 2888093085696. Its totient is φ = 888560345088.

The previous prime is 1666129098103. The next prime is 1666129098199. The reversal of 1666129098195 is 5918909216661.

It is not a de Polignac number, because 1666129098195 - 2²⁹ = 1665592227283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1666129098199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106707 + ... + 1828563.

It is an arithmetic number, because the mean of its divisors is an integer number (120337211904).

Almost surely, 2^{1666129098195} is an apocalyptic number.

1666129098195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1666129098195 is a deficient number, since it is larger than the sum of its proper divisors (1221963987501).

1666129098195 is a wasteful number, since it uses less digits than its factorization.

1666129098195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743371 (or 1743368 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 63.

The spelling of 1666129098195 in words is "one trillion, six hundred sixty-six billion, one hundred twenty-nine million, ninety-eight thousand, one hundred ninety-five".