206633666331 has 16 divisors (see below), whose sum is σ = 316679949600. Its totient is φ = 133005577824.

The previous prime is 206633666311. The next prime is 206633666341. The reversal of 206633666331 is 133666336602.

It is not a de Polignac number, because 206633666331 - 2⁷ = 206633666203 is a prime.

It is a super-2 number, since 2×206633666331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206633666311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131949196 + ... + 131950761.

It is an arithmetic number, because the mean of its divisors is an integer number (19792496850).

Almost surely, 2^206633666331 is an apocalyptic number.

206633666331 is a deficient number, since it is larger than the sum of its proper divisors (110046283269).

206633666331 is a wasteful number, since it uses less digits than its factorization.

206633666331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263899995 (or 263899989 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 45.

The spelling of 206633666331 in words is "two hundred six billion, six hundred thirty-three million, six hundred sixty-six thousand, three hundred thirty-one".