206664090 has 32 divisors (see below), whose sum is σ = 496895040. Its totient is φ = 55010304.

The previous prime is 206664077. The next prime is 206664091. The reversal of 206664090 is 90466602.

It is not an unprimeable number, because it can be changed into a prime (206664091) 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 15 ways as a sum of consecutive naturals, for example, 11341 + ... + 23279.

It is an arithmetic number, because the mean of its divisors is an integer number (15527970).

Almost surely, 2^206664090 is an apocalyptic number.

206664090 is an abundant number, since it is smaller than the sum of its proper divisors (290230950).

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

206664090 is a wasteful number, since it uses less digits than its factorization.

206664090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12526.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 206664090 is about 14375.8161507443. The cubic root of 206664090 is about 591.2280177528.

The spelling of 206664090 in words is "two hundred six million, six hundred sixty-four thousand, ninety".