206660751111 has 16 divisors (see below), whose sum is σ = 306256454400. Its totient is φ = 137732263704.

The previous prime is 206660751109. The next prime is 206660751131. The reversal of 206660751111 is 111157066602.

It is a happy number.

206660751111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 206660751111 - 2¹ = 206660751109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206660751131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1063461 + ... + 1242686.

It is an arithmetic number, because the mean of its divisors is an integer number (19141028400).

Almost surely, 2^206660751111 is an apocalyptic number.

206660751111 is a deficient number, since it is larger than the sum of its proper divisors (99595703289).

206660751111 is a wasteful number, since it uses less digits than its factorization.

206660751111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309475 (or 2309469 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 206660751111 in words is "two hundred six billion, six hundred sixty million, seven hundred fifty-one thousand, one hundred eleven".