206660426020 has 24 divisors (see below), whose sum is σ = 439931923704. Its totient is φ = 81531783936.

The previous prime is 206660425987. The next prime is 206660426029. The reversal of 206660426020 is 20624066602.

206660426020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19557463104 + 187102962916 = 139848^2 + 432554^2 .

It is not an unprimeable number, because it can be changed into a prime (206660426029) 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 7 ways as a sum of consecutive naturals, for example, 70772659 + ... + 70775578.

It is an arithmetic number, because the mean of its divisors is an integer number (18330496821).

Almost surely, 2^206660426020 is an apocalyptic number.

206660426020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206660426020 is an abundant number, since it is smaller than the sum of its proper divisors (233271497684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206660426020 is a wasteful number, since it uses less digits than its factorization.

206660426020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141548319 (or 141548317 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 206660426020 in words is "two hundred six billion, six hundred sixty million, four hundred twenty-six thousand, twenty".