2000071665 has 12 divisors (see below), whose sum is σ = 3466790964. Its totient is φ = 1066704864.

The previous prime is 2000071657. The next prime is 2000071673. The reversal of 2000071665 is 5661700002.

2000071665 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2000071657) and next prime (2000071673).

It can be written as a sum of positive squares in 2 ways, for example, as 421439841 + 1578631824 = 20529^2 + 39732^2 .

It is not a de Polignac number, because 2000071665 - 2³ = 2000071657 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22222974 + ... + 22223063.

It is an arithmetic number, because the mean of its divisors is an integer number (288899247).

Almost surely, 2^2000071665 is an apocalyptic number.

It is an amenable number.

2000071665 is a deficient number, since it is larger than the sum of its proper divisors (1466719299).

2000071665 is a wasteful number, since it uses less digits than its factorization.

2000071665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44446048 (or 44446045 counting only the distinct ones).

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

The square root of 2000071665 is about 44722.1607818764. The cubic root of 2000071665 is about 1259.9360984221.

Adding to 2000071665 its reverse (5661700002), we get a palindrome (7661771667).

The spelling of 2000071665 in words is "two billion, seventy-one thousand, six hundred sixty-five".