206661304 has 8 divisors (see below), whose sum is σ = 387489960. Its totient is φ = 103330648.

The previous prime is 206661281. The next prime is 206661319. The reversal of 206661304 is 403166602.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×206661304³ (a number of 26 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 12916324 + ... + 12916339.

It is an arithmetic number, because the mean of its divisors is an integer number (48436245).

Almost surely, 2^206661304 is an apocalyptic number.

It is an amenable number.

206661304 is a deficient number, since it is larger than the sum of its proper divisors (180828656).

206661304 is a wasteful number, since it uses less digits than its factorization.

206661304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25832669 (or 25832665 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 206661304 is about 14375.7192515714. The cubic root of 206661304 is about 591.2253609960.

The spelling of 206661304 in words is "two hundred six million, six hundred sixty-one thousand, three hundred four".