206604406 has 4 divisors (see below), whose sum is σ = 309906612. Its totient is φ = 103302202.

The previous prime is 206604401. The next prime is 206604413. The reversal of 206604406 is 604406602.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×206604406² = 85370761157225672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206604401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51651100 + ... + 51651103.

It is an arithmetic number, because the mean of its divisors is an integer number (77476653).

Almost surely, 2^206604406 is an apocalyptic number.

206604406 is a deficient number, since it is larger than the sum of its proper divisors (103302206).

206604406 is a wasteful number, since it uses less digits than its factorization.

206604406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103302205.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 206604406 is about 14373.7401534882. The cubic root of 206604406 is about 591.1710972843.

The spelling of 206604406 in words is "two hundred six million, six hundred four thousand, four hundred six".