206655755 has 4 divisors (see below), whose sum is σ = 247986912. Its totient is φ = 165324600.

The previous prime is 206655737. The next prime is 206655763. The reversal of 206655755 is 557556602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 206655755 - 2¹² = 206651659 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20665571 + ... + 20665580.

It is an arithmetic number, because the mean of its divisors is an integer number (61996728).

Almost surely, 2^206655755 is an apocalyptic number.

206655755 is a deficient number, since it is larger than the sum of its proper divisors (41331157).

206655755 is an equidigital number, since it uses as much as digits as its factorization.

206655755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41331156.

The product of its (nonzero) digits is 315000, while the sum is 41.

The square root of 206655755 is about 14375.5262512369. The cubic root of 206655755 is about 591.2200693444.

The spelling of 206655755 in words is "two hundred six million, six hundred fifty-five thousand, seven hundred fifty-five".