201016665 has 48 divisors (see below), whose sum is σ = 365264640. Its totient is φ = 102072960.

The previous prime is 201016663. The next prime is 201016667. The reversal of 201016665 is 566610102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (201016663) and next prime (201016667).

It is not a de Polignac number, because 201016665 - 2¹ = 201016663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201016663) by changing a digit.

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 in 47 ways as a sum of consecutive naturals, for example, 371295 + ... + 371835.

It is an arithmetic number, because the mean of its divisors is an integer number (7609680).

Almost surely, 2^201016665 is an apocalyptic number.

It is an amenable number.

201016665 is a deficient number, since it is larger than the sum of its proper divisors (164247975).

201016665 is a wasteful number, since it uses less digits than its factorization.

201016665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 201016665 is about 14178.0345958105. The cubic root of 201016665 is about 585.7927888177.

Adding to 201016665 its reverse (566610102), we get a palindrome (767626767).

The spelling of 201016665 in words is "two hundred one million, sixteen thousand, six hundred sixty-five".