206616655670 has 16 divisors (see below), whose sum is σ = 372035976480. Its totient is φ = 82618663104.

The previous prime is 206616655643. The next prime is 206616655699. The reversal of 206616655670 is 76556616602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3468890 + ... + 3527949.

It is an arithmetic number, because the mean of its divisors is an integer number (23252248530).

Almost surely, 2^206616655670 is an apocalyptic number.

206616655670 is a deficient number, since it is larger than the sum of its proper divisors (165419320810).

206616655670 is a wasteful number, since it uses less digits than its factorization.

206616655670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6999799.

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 206616655670 in words is "two hundred six billion, six hundred sixteen million, six hundred fifty-five thousand, six hundred seventy".