206006651 has 4 divisors (see below), whose sum is σ = 206047752. Its totient is φ = 205965552.

The previous prime is 206006627. The next prime is 206006659. The reversal of 206006651 is 156600602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206006651 - 2¹⁸ = 205744507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206006651.

It is not an unprimeable number, because it can be changed into a prime (206006659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11786 + ... + 23471.

It is an arithmetic number, because the mean of its divisors is an integer number (51511938).

Almost surely, 2^206006651 is an apocalyptic number.

206006651 is a deficient number, since it is larger than the sum of its proper divisors (41101).

206006651 is an equidigital number, since it uses as much as digits as its factorization.

206006651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41100.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 206006651 is about 14352.9317911011. The cubic root of 206006651 is about 590.6004143476.

The spelling of 206006651 in words is "two hundred six million, six thousand, six hundred fifty-one".