201670065 has 24 divisors (see below), whose sum is σ = 370125288. Its totient is φ = 101230080.

The previous prime is 201670039. The next prime is 201670181. The reversal of 201670065 is 560076102.

It can be written as a sum of positive squares in 4 ways, for example, as 96648561 + 105021504 = 9831^2 + 10248^2 .

It is not a de Polignac number, because 201670065 - 2¹¹ = 201668017 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 131046 + ... + 132575.

It is an arithmetic number, because the mean of its divisors is an integer number (15421887).

Almost surely, 2^201670065 is an apocalyptic number.

It is an amenable number.

201670065 is a deficient number, since it is larger than the sum of its proper divisors (168455223).

201670065 is a wasteful number, since it uses less digits than its factorization.

201670065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263649 (or 263646 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 201670065 is about 14201.0585873026. The cubic root of 201670065 is about 586.4268043130.

The spelling of 201670065 in words is "two hundred one million, six hundred seventy thousand, sixty-five".