201166695028457 has 2 divisors, whose sum is σ = 201166695028458. Its totient is φ = 201166695028456.

The previous prime is 201166695028451. The next prime is 201166695028459. The reversal of 201166695028457 is 754820596661102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187696466455696 + 13470228572761 = 13700236^2 + 3670181^2 .

It is a cyclic number.

It is not a de Polignac number, because 201166695028457 - 2⁴⁰ = 200067183400681 is a prime.

Together with 201166695028459, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201166695028457.

It is not a weakly prime, because it can be changed into another prime (201166695028451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100583347514228 + 100583347514229.

It is an arithmetic number, because the mean of its divisors is an integer number (100583347514229).

Almost surely, 2^{201166695028457} is an apocalyptic number.

It is an amenable number.

201166695028457 is a deficient number, since it is larger than the sum of its proper divisors (1).

201166695028457 is an equidigital number, since it uses as much as digits as its factorization.

201166695028457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43545600, while the sum is 62.

The spelling of 201166695028457 in words is "two hundred one trillion, one hundred sixty-six billion, six hundred ninety-five million, twenty-eight thousand, four hundred fifty-seven".