206656565652 has 48 divisors (see below), whose sum is σ = 545885282880. Its totient is φ = 67585793184.

The previous prime is 206656565627. The next prime is 206656565653. The reversal of 206656565652 is 256565656602.

206656565652 is a `hidden beast` number, since 20 + 6 + 6 + 5 + 6 + 56 + 565 + 2 = 666.

It is a super-2 number, since 2×206656565652² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206656565653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18046038 + ... + 18057485.

It is an arithmetic number, because the mean of its divisors is an integer number (11372610060).

Almost surely, 2^206656565652 is an apocalyptic number.

It is an amenable number.

206656565652 is an abundant number, since it is smaller than the sum of its proper divisors (339228717228).

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

206656565652 is a wasteful number, since it uses less digits than its factorization.

206656565652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36103589 (or 36103581 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 54.

The spelling of 206656565652 in words is "two hundred six billion, six hundred fifty-six million, five hundred sixty-five thousand, six hundred fifty-two".