206715867007 has 4 divisors (see below), whose sum is σ = 222617087560. Its totient is φ = 190814646456.

The previous prime is 206715866971. The next prime is 206715867013. The reversal of 206715867007 is 700768517602.

It is a happy number.

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 206715867007 - 2¹⁹ = 206715342719 is a prime.

It is a super-2 number, since 2×206715867007² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206715867907) 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, 7950610257 + ... + 7950610282.

It is an arithmetic number, because the mean of its divisors is an integer number (55654271890).

Almost surely, 2^206715867007 is an apocalyptic number.

206715867007 is a deficient number, since it is larger than the sum of its proper divisors (15901220553).

206715867007 is a wasteful number, since it uses less digits than its factorization.

206715867007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15901220552.

The product of its (nonzero) digits is 987840, while the sum is 49.

The spelling of 206715867007 in words is "two hundred six billion, seven hundred fifteen million, eight hundred sixty-seven thousand, seven".