206600331640 has 32 divisors (see below), whose sum is σ = 465048682560. Its totient is φ = 82604944000.

The previous prime is 206600331631. The next prime is 206600331659. The reversal of 206600331640 is 46133006602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004431 + ... + 1192510.

It is an arithmetic number, because the mean of its divisors is an integer number (14532771330).

Almost surely, 2^206600331640 is an apocalyptic number.

206600331640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206600331640 is an abundant number, since it is smaller than the sum of its proper divisors (258448350920).

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

206600331640 is a wasteful number, since it uses less digits than its factorization.

206600331640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199303 (or 2199299 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 206600331640 in words is "two hundred six billion, six hundred million, three hundred thirty-one thousand, six hundred forty".