206207866081 has 16 divisors (see below), whose sum is σ = 240000353280. Its totient is φ = 173510326080.

The previous prime is 206207866061. The next prime is 206207866091. The reversal of 206207866081 is 180668702602.

It is not a de Polignac number, because 206207866081 - 2⁵ = 206207866049 is a prime.

It is a super-2 number, since 2×206207866081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206207866031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257041 + ... + 691726.

It is an arithmetic number, because the mean of its divisors is an integer number (15000022080).

Almost surely, 2^206207866081 is an apocalyptic number.

It is an amenable number.

206207866081 is a deficient number, since it is larger than the sum of its proper divisors (33792487199).

206207866081 is an equidigital number, since it uses as much as digits as its factorization.

206207866081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949344.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 206207866081 in words is "two hundred six billion, two hundred seven million, eight hundred sixty-six thousand, eighty-one".