201660636043351 has 16 divisors (see below), whose sum is σ = 205380945360000. Its totient is φ = 197962388176608.

The previous prime is 201660636043343. The next prime is 201660636043357. The reversal of 201660636043351 is 153340636066102.

It is a cyclic number.

It is not a de Polignac number, because 201660636043351 - 2³ = 201660636043343 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 (201660636043357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18419085 + ... + 27250393.

It is an arithmetic number, because the mean of its divisors is an integer number (12836309085000).

Almost surely, 2^{201660636043351} is an apocalyptic number.

201660636043351 is a deficient number, since it is larger than the sum of its proper divisors (3720309316649).

201660636043351 is an equidigital number, since it uses as much as digits as its factorization.

201660636043351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8832558.

The product of its (nonzero) digits is 1399680, while the sum is 46.

The spelling of 201660636043351 in words is "two hundred one trillion, six hundred sixty billion, six hundred thirty-six million, forty-three thousand, three hundred fifty-one".