206006664 has 64 divisors (see below), whose sum is σ = 548755200. Its totient is φ = 64259136.

The previous prime is 206006659. The next prime is 206006681. The reversal of 206006664 is 466600602.

It is a super-2 number, since 2×206006664² = 84877491224817792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35127 + ... + 40569.

It is an arithmetic number, because the mean of its divisors is an integer number (8574300).

Almost surely, 2^206006664 is an apocalyptic number.

206006664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206006664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274377600).

206006664 is an abundant number, since it is smaller than the sum of its proper divisors (342748536).

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

206006664 is a wasteful number, since it uses less digits than its factorization.

206006664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5554 (or 5550 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 206006664 is about 14352.9322439702. The cubic root of 206006664 is about 590.6004267708.

The spelling of 206006664 in words is "two hundred six million, six thousand, six hundred sixty-four".