2000137666 has 4 divisors (see below), whose sum is σ = 3000206502. Its totient is φ = 1000068832.

The previous prime is 2000137649. The next prime is 2000137679. The reversal of 2000137666 is 6667310002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1397189641 + 602948025 = 37379^2 + 24555^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500034415 + ... + 500034418.

Almost surely, 2^2000137666 is an apocalyptic number.

2000137666 is a deficient number, since it is larger than the sum of its proper divisors (1000068836).

2000137666 is a wasteful number, since it uses less digits than its factorization.

2000137666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000068835.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 2000137666 is about 44722.8986761815. The cubic root of 2000137666 is about 1259.9499572802.

Adding to 2000137666 its reverse (6667310002), we get a palindrome (8667447668).

The spelling of 2000137666 in words is "two billion, one hundred thirty-seven thousand, six hundred sixty-six".