201010066 has 4 divisors (see below), whose sum is σ = 301515102. Its totient is φ = 100505032.

The previous prime is 201010037. The next prime is 201010081. The reversal of 201010066 is 660010102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 158382225 + 42627841 = 12585^2 + 6529^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50252515 + ... + 50252518.

Almost surely, 2^201010066 is an apocalyptic number.

201010066 is a deficient number, since it is larger than the sum of its proper divisors (100505036).

201010066 is a wasteful number, since it uses less digits than its factorization.

201010066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100505035.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 201010066 is about 14177.8018747618. The cubic root of 201010066 is about 585.7863785882.

Adding to 201010066 its reverse (660010102), we get a palindrome (861020168).

The spelling of 201010066 in words is "two hundred one million, ten thousand, sixty-six".