206660550 has 24 divisors (see below), whose sum is σ = 512518536. Its totient is φ = 55109440.

The previous prime is 206660533. The next prime is 206660557. The reversal of 206660550 is 55066602.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206660557) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 688719 + ... + 689018.

It is an arithmetic number, because the mean of its divisors is an integer number (21354939).

Almost surely, 2^206660550 is an apocalyptic number.

206660550 is an abundant number, since it is smaller than the sum of its proper divisors (305857986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206660550 is a wasteful number, since it uses less digits than its factorization.

206660550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377752 (or 1377747 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 206660550 is about 14375.6930267727. The cubic root of 206660550 is about 591.2246419702.

The spelling of 206660550 in words is "two hundred six million, six hundred sixty thousand, five hundred fifty".