206663669700 has 36 divisors (see below), whose sum is σ = 597946885200. Its totient is φ = 55110311840.

The previous prime is 206663669683. The next prime is 206663669713. The reversal of 206663669700 is 7966366602.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344439150 + ... + 344439749.

It is an arithmetic number, because the mean of its divisors is an integer number (16609635700).

Almost surely, 2^206663669700 is an apocalyptic number.

206663669700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206663669700 is an abundant number, since it is smaller than the sum of its proper divisors (391283215500).

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

206663669700 is a wasteful number, since it uses less digits than its factorization.

206663669700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688878916 (or 688878909 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 51.

The spelling of 206663669700 in words is "two hundred six billion, six hundred sixty-three million, six hundred sixty-nine thousand, seven hundred".