201660510137 has 2 divisors, whose sum is σ = 201660510138. Its totient is φ = 201660510136.

The previous prime is 201660510071. The next prime is 201660510173. The reversal of 201660510137 is 731015066102.

Together with next prime (201660510173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180634350121 + 21026160016 = 425011^2 + 145004^2 .

It is a cyclic number.

It is not a de Polignac number, because 201660510137 - 2¹² = 201660506041 is a prime.

It is a super-2 number, since 2×201660510137² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201660210137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100830255068 + 100830255069.

It is an arithmetic number, because the mean of its divisors is an integer number (100830255069).

Almost surely, 2^201660510137 is an apocalyptic number.

It is an amenable number.

201660510137 is a deficient number, since it is larger than the sum of its proper divisors (1).

201660510137 is an equidigital number, since it uses as much as digits as its factorization.

201660510137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

Adding to 201660510137 its reverse (731015066102), we get a palindrome (932675576239).

The spelling of 201660510137 in words is "two hundred one billion, six hundred sixty million, five hundred ten thousand, one hundred thirty-seven".