1906666634041 has 9 divisors (see below), whose sum is σ = 2064634787181. Its totient is φ = 1759983400032.

The previous prime is 1906666634029. The next prime is 1906666634051. The reversal of 1906666634041 is 1404366666091.

The square root of 1906666634041 is 1380821.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 990779353641 + 915887280400 = 995379^2 + 957020^2 .

It is not a de Polignac number, because 1906666634041 - 2⁵ = 1906666634009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1906666634041.

It is not an unprimeable number, because it can be changed into a prime (1906666634011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17897565 + ... + 18003781.

Almost surely, 2^{1906666634041} is an apocalyptic number.

1906666634041 is the 1380821-st square number.

1906666634041 is the 690411-st centered octagonal number.

It is an amenable number.

1906666634041 is a deficient number, since it is larger than the sum of its proper divisors (157968153140).

1906666634041 is an frugal number, since it uses more digits than its factorization.

1906666634041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212460 (or 106230 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 52.

The spelling of 1906666634041 in words is "one trillion, nine hundred six billion, six hundred sixty-six million, six hundred thirty-four thousand, forty-one".