206660106 has 32 divisors (see below), whose sum is σ = 479214720. Its totient is φ = 65891232.

The previous prime is 206660101. The next prime is 206660137. The reversal of 206660106 is 601066602.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 206660106.

It is not an unprimeable number, because it can be changed into a prime (206660101) 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, 81955 + ... + 84438.

It is an arithmetic number, because the mean of its divisors is an integer number (14975460).

Almost surely, 2^206660106 is an apocalyptic number.

206660106 is an abundant number, since it is smaller than the sum of its proper divisors (272554614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206660106 is a wasteful number, since it uses less digits than its factorization.

206660106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166427 (or 166421 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 206660106 is about 14375.6775840306. The cubic root of 206660106 is about 591.2242185642.

The spelling of 206660106 in words is "two hundred six million, six hundred sixty thousand, one hundred six".