206660517001611 has 16 divisors (see below), whose sum is σ = 275646534104064. Its totient is φ = 137724097850784.

The previous prime is 206660517001571. The next prime is 206660517001667. The reversal of 206660517001611 is 116100715066602.

It is a happy number.

It is not a de Polignac number, because 206660517001611 - 2²⁵ = 206660483447179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206660517101611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92236326 + ... + 94450308.

It is an arithmetic number, because the mean of its divisors is an integer number (17227908381504).

Almost surely, 2^{206660517001611} is an apocalyptic number.

206660517001611 is a deficient number, since it is larger than the sum of its proper divisors (68986017102453).

206660517001611 is a wasteful number, since it uses less digits than its factorization.

206660517001611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225170.

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 206660517001611 in words is "two hundred six trillion, six hundred sixty billion, five hundred seventeen million, one thousand, six hundred eleven".