206660703912961 has 4 divisors (see below), whose sum is σ = 206729066702592. Its totient is φ = 206592341123332.

The previous prime is 206660703912937. The next prime is 206660703912973. The reversal of 206660703912961 is 169219307066602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206660703912961 - 2⁹ = 206660703912449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206660703912896 and 206660703912905.

It is not an unprimeable number, because it can be changed into a prime (206660703912931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34181390281 + ... + 34181396326.

It is an arithmetic number, because the mean of its divisors is an integer number (51682266675648).

Almost surely, 2^{206660703912961} is an apocalyptic number.

It is an amenable number.

206660703912961 is a deficient number, since it is larger than the sum of its proper divisors (68362789631).

206660703912961 is an equidigital number, since it uses as much as digits as its factorization.

206660703912961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68362789630.

The product of its (nonzero) digits is 8817984, while the sum is 58.

The spelling of 206660703912961 in words is "two hundred six trillion, six hundred sixty billion, seven hundred three million, nine hundred twelve thousand, nine hundred sixty-one".