201666653 has 2 divisors, whose sum is σ = 201666654. Its totient is φ = 201666652.

The previous prime is 201666623. The next prime is 201666683. The reversal of 201666653 is 356666102.

It is a balanced prime because it is at equal distance from previous prime (201666623) and next prime (201666683).

It can be written as a sum of positive squares in only one way, i.e., 185449924 + 16216729 = 13618^2 + 4027^2 .

It is a cyclic number.

It is not a de Polignac number, because 201666653 - 2¹² = 201662557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201666623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100833326 + 100833327.

It is an arithmetic number, because the mean of its divisors is an integer number (100833327).

Almost surely, 2^201666653 is an apocalyptic number.

It is an amenable number.

201666653 is a deficient number, since it is larger than the sum of its proper divisors (1).

201666653 is an equidigital number, since it uses as much as digits as its factorization.

201666653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 201666653 is about 14200.9384549050. The cubic root of 201666653 is about 586.4234970968.

The spelling of 201666653 in words is "two hundred one million, six hundred sixty-six thousand, six hundred fifty-three".