199766312705 has 8 divisors (see below), whose sum is σ = 239754719400. Its totient is φ = 159789620736.

The previous prime is 199766312699. The next prime is 199766312723. The reversal of 199766312705 is 507213667991.

It can be written as a sum of positive squares in 4 ways, for example, as 39254704384 + 160511608321 = 198128^2 + 400639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199766312705 - 2¹⁶ = 199766247169 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2891120 + ... + 2959409.

It is an arithmetic number, because the mean of its divisors is an integer number (29969339925).

Almost surely, 2^199766312705 is an apocalyptic number.

It is an amenable number.

199766312705 is a deficient number, since it is larger than the sum of its proper divisors (39988406695).

199766312705 is an equidigital number, since it uses as much as digits as its factorization.

199766312705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5857363.

The product of its (nonzero) digits is 4286520, while the sum is 56.

The spelling of 199766312705 in words is "one hundred ninety-nine billion, seven hundred sixty-six million, three hundred twelve thousand, seven hundred five".