201660510171 has 8 divisors (see below), whose sum is σ = 268882757440. Its totient is φ = 134439301512.

The previous prime is 201660510137. The next prime is 201660510173. The reversal of 201660510171 is 171015066102.

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

It is not a de Polignac number, because 201660510171 - 2¹⁹ = 201659985883 is a prime.

It is a super-2 number, since 2×201660510171² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201660510173) 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, 599820 + ... + 873558.

It is an arithmetic number, because the mean of its divisors is an integer number (33610344680).

Almost surely, 2^201660510171 is an apocalyptic number.

201660510171 is a deficient number, since it is larger than the sum of its proper divisors (67222247269).

201660510171 is a wasteful number, since it uses less digits than its factorization.

201660510171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519305.

The product of its (nonzero) digits is 2520, while the sum is 30.

Adding to 201660510171 its reverse (171015066102), we get a palindrome (372675576273).

The spelling of 201660510171 in words is "two hundred one billion, six hundred sixty million, five hundred ten thousand, one hundred seventy-one".