1666060650129 has 8 divisors (see below), whose sum is σ = 2232577086400. Its totient is φ = 1105125656976.

The previous prime is 1666060650073. The next prime is 1666060650151. The reversal of 1666060650129 is 9210560606661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1666060650129 - 2²⁰ = 1666059601553 is a prime.

It is a super-2 number, since 2×1666060650129² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666060660129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1395360082 + ... + 1395361275.

It is an arithmetic number, because the mean of its divisors is an integer number (279072135800).

Almost surely, 2^{1666060650129} is an apocalyptic number.

It is an amenable number.

1666060650129 is a deficient number, since it is larger than the sum of its proper divisors (566516436271).

1666060650129 is a wasteful number, since it uses less digits than its factorization.

1666060650129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790721559.

The product of its (nonzero) digits is 699840, while the sum is 48.

The spelling of 1666060650129 in words is "one trillion, six hundred sixty-six billion, sixty million, six hundred fifty thousand, one hundred twenty-nine".