206866636800000 has 816 divisors, whose sum is σ = 719533736893440. Its totient is φ = 52762378240000.

The previous prime is 206866636799981. The next prime is 206866636800001. The reversal of 206866636800000 is 8636668602.

It is a super-2 number, since 2×206866636800000² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206866636800001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14131192681 + ... + 14131207319.

Almost surely, 2^{206866636800000} is an apocalyptic number.

206866636800000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206866636800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359766868446720).

206866636800000 is an abundant number, since it is smaller than the sum of its proper divisors (512667100093440).

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

206866636800000 is an frugal number, since it uses more digits than its factorization.

206866636800000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14722 (or 14672 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 206866636800000 in words is "two hundred six trillion, eight hundred sixty-six billion, six hundred thirty-six million, eight hundred thousand".