2000000066 has 4 divisors (see below), whose sum is σ = 3000000102. Its totient is φ = 1000000032.

The previous prime is 2000000063. The next prime is 2000000087. The reversal of 2000000066 is 6600000002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6600000002 = 2 ⋅3300000001.

It can be written as a sum of positive squares in only one way, i.e., 1086691225 + 913308841 = 32965^2 + 30221^2 .

2000000066 is a modest number, since divided by 66 gives 20 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2000000063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000015 + ... + 500000018.

Almost surely, 2^2000000066 is an apocalyptic number.

2000000066 is a deficient number, since it is larger than the sum of its proper divisors (1000000036).

2000000066 is a wasteful number, since it uses less digits than its factorization.

2000000066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000000035.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2000000066 is about 44721.3602878982. The cubic root of 2000000066 is about 1259.9210637540.

Adding to 2000000066 its reverse (6600000002), we get a palindrome (8600000068).

The spelling of 2000000066 in words is "two billion, sixty-six", and thus it is an aban number, an eban number, and an uban number.