206660444 has 6 divisors (see below), whose sum is σ = 361655784. Its totient is φ = 103330220.

The previous prime is 206660431. The next prime is 206660479. The reversal of 206660444 is 444066602.

It is a super-2 number, since 2×206660444² = 85417078228554272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206660444.

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, 25832552 + ... + 25832559.

It is an arithmetic number, because the mean of its divisors is an integer number (60275964).

Almost surely, 2^206660444 is an apocalyptic number.

It is an amenable number.

206660444 is a deficient number, since it is larger than the sum of its proper divisors (154995340).

206660444 is a wasteful number, since it uses less digits than its factorization.

206660444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51665115 (or 51665113 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 206660444 is about 14375.6893399934. The cubic root of 206660444 is about 591.2245408868.

The spelling of 206660444 in words is "two hundred six million, six hundred sixty thousand, four hundred forty-four".