206138662 has 8 divisors (see below), whose sum is σ = 309726000. Its totient is φ = 102896664.

The previous prime is 206138599. The next prime is 206138671. The reversal of 206138662 is 266831602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84837 + ... + 87232.

It is an arithmetic number, because the mean of its divisors is an integer number (38715750).

Almost surely, 2^206138662 is an apocalyptic number.

206138662 is a deficient number, since it is larger than the sum of its proper divisors (103587338).

206138662 is a wasteful number, since it uses less digits than its factorization.

206138662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172670.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 206138662 is about 14357.5298014665. The cubic root of 206138662 is about 590.7265415108.

The spelling of 206138662 in words is "two hundred six million, one hundred thirty-eight thousand, six hundred sixty-two".