206734666680 has 96 divisors (see below), whose sum is σ = 681915920400. Its totient is φ = 54306413568.

The previous prime is 206734666679. The next prime is 206734666739. The reversal of 206734666680 is 86666437602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4261425 + ... + 4309664.

Almost surely, 2^206734666680 is an apocalyptic number.

206734666680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206734666680 is an abundant number, since it is smaller than the sum of its proper divisors (475181253720).

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

206734666680 is a wasteful number, since it uses less digits than its factorization.

206734666680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8571173 (or 8571166 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 54.

The spelling of 206734666680 in words is "two hundred six billion, seven hundred thirty-four million, six hundred sixty-six thousand, six hundred eighty".