206660066 has 8 divisors (see below), whose sum is σ = 310175184. Its totient is φ = 103268340.

The previous prime is 206660053. The next prime is 206660071. The reversal of 206660066 is 660066602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26540 + ... + 33431.

It is an arithmetic number, because the mean of its divisors is an integer number (38771898).

Almost surely, 2^206660066 is an apocalyptic number.

206660066 is a deficient number, since it is larger than the sum of its proper divisors (103515118).

206660066 is a wasteful number, since it uses less digits than its factorization.

206660066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61696.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 206660066 is about 14375.6761927918. The cubic root of 206660066 is about 591.2241804195.

The spelling of 206660066 in words is "two hundred six million, six hundred sixty thousand, sixty-six".