206040000660 has 48 divisors (see below), whose sum is σ = 621289850496. Its totient is φ = 50717538432.

The previous prime is 206040000641. The next prime is 206040000703. The reversal of 206040000660 is 66000040602.

It is a self number, because there is not a number n which added to its sum of digits gives 206040000660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132076144 + ... + 132077703.

It is an arithmetic number, because the mean of its divisors is an integer number (12943538552).

Almost surely, 2^206040000660 is an apocalyptic number.

206040000660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206040000660 is an abundant number, since it is smaller than the sum of its proper divisors (415249849836).

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

206040000660 is a wasteful number, since it uses less digits than its factorization.

206040000660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264153872 (or 264153870 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The spelling of 206040000660 in words is "two hundred six billion, forty million, six hundred sixty", and thus it is an aban number.