206869664 has 24 divisors (see below), whose sum is σ = 418284468. Its totient is φ = 100638720.

The previous prime is 206869643. The next prime is 206869667. The reversal of 206869664 is 466968602.

It can be written as a sum of positive squares in 2 ways, for example, as 206784400 + 85264 = 14380^2 + 292^2 .

It is not an unprimeable number, because it can be changed into a prime (206869667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86177 + ... + 88544.

Almost surely, 2^206869664 is an apocalyptic number.

It is an amenable number.

206869664 is an abundant number, since it is smaller than the sum of its proper divisors (211414804).

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

206869664 is a wasteful number, since it uses less digits than its factorization.

206869664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174768 (or 174760 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 206869664 is about 14382.9643676121. The cubic root of 206869664 is about 591.4239892780.

The spelling of 206869664 in words is "two hundred six million, eight hundred sixty-nine thousand, six hundred sixty-four".