206630071 has 4 divisors (see below), whose sum is σ = 208017000. Its totient is φ = 205243144.

The previous prime is 206630069. The next prime is 206630107. The reversal of 206630071 is 170036602.

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 206630071 - 2¹ = 206630069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206630041) 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, 693241 + ... + 693538.

It is an arithmetic number, because the mean of its divisors is an integer number (52004250).

Almost surely, 2^206630071 is an apocalyptic number.

206630071 is a deficient number, since it is larger than the sum of its proper divisors (1386929).

206630071 is a wasteful number, since it uses less digits than its factorization.

206630071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386928.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 206630071 is about 14374.6328996604. The cubic root of 206630071 is about 591.1955752683.

Adding to 206630071 its reverse (170036602), we get a palindrome (376666673).

The spelling of 206630071 in words is "two hundred six million, six hundred thirty thousand, seventy-one".