206422665 has 8 divisors (see below), whose sum is σ = 330276288. Its totient is φ = 110092080.

The previous prime is 206422633. The next prime is 206422673. The reversal of 206422665 is 566224602.

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

It is not a de Polignac number, because 206422665 - 2⁵ = 206422633 is a prime.

It is a super-2 number, since 2×206422665² = 85220633251404450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6880741 + ... + 6880770.

It is an arithmetic number, because the mean of its divisors is an integer number (41284536).

Almost surely, 2^206422665 is an apocalyptic number.

It is an amenable number.

206422665 is a deficient number, since it is larger than the sum of its proper divisors (123853623).

206422665 is a wasteful number, since it uses less digits than its factorization.

206422665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13761519.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 206422665 is about 14367.4167824282. The cubic root of 206422665 is about 590.9977038456.

The spelling of 206422665 in words is "two hundred six million, four hundred twenty-two thousand, six hundred sixty-five".