1660065566101 has 6 divisors (see below), whose sum is σ = 1763460653570. Its totient is φ = 1562414650176.

The previous prime is 1660065566059. The next prime is 1660065566111. The reversal of 1660065566101 is 1016655600661.

It can be written as a sum of positive squares in 3 ways, for example, as 1134768215025 + 525297351076 = 1065255^2 + 724774^2 .

It is not a de Polignac number, because 1660065566101 - 2⁷ = 1660065565973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660065566111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2872085466 + ... + 2872086043.

Almost surely, 2^{1660065566101} is an apocalyptic number.

It is an amenable number.

1660065566101 is a deficient number, since it is larger than the sum of its proper divisors (103395087469).

1660065566101 is an equidigital number, since it uses as much as digits as its factorization.

1660065566101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5744171543 (or 5744171526 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 1660065566101 in words is "one trillion, six hundred sixty billion, sixty-five million, five hundred sixty-six thousand, one hundred one".