206556606507 has 4 divisors (see below), whose sum is σ = 275408808680. Its totient is φ = 137704404336.

The previous prime is 206556606491. The next prime is 206556606527. The reversal of 206556606507 is 705606655602.

206556606507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 206556606507 - 2⁴ = 206556606491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206556606527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34426101082 + ... + 34426101087.

It is an arithmetic number, because the mean of its divisors is an integer number (68852202170).

Almost surely, 2^206556606507 is an apocalyptic number.

206556606507 is a deficient number, since it is larger than the sum of its proper divisors (68852202173).

206556606507 is an equidigital number, since it uses as much as digits as its factorization.

206556606507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68852202172.

The product of its (nonzero) digits is 2268000, while the sum is 48.

The spelling of 206556606507 in words is "two hundred six billion, five hundred fifty-six million, six hundred six thousand, five hundred seven".