201666382 has 16 divisors (see below), whose sum is σ = 307527552. Its totient is φ = 99162360.

The previous prime is 201666349. The next prime is 201666383. The reversal of 201666382 is 283666102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201666383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130957 + ... + 132487.

It is an arithmetic number, because the mean of its divisors is an integer number (19220472).

Almost surely, 2^201666382 is an apocalyptic number.

201666382 is a deficient number, since it is larger than the sum of its proper divisors (105861170).

201666382 is a wasteful number, since it uses less digits than its factorization.

201666382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 201666382 is about 14200.9289132789. The cubic root of 201666382 is about 586.4232344177.

The spelling of 201666382 in words is "two hundred one million, six hundred sixty-six thousand, three hundred eighty-two".