205006566 has 16 divisors (see below), whose sum is σ = 421095024. Its totient is φ = 66488544.

The previous prime is 205006547. The next prime is 205006577. The reversal of 205006566 is 665600502.

205006566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×205006566² = 84055384206224712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 461505 + ... + 461948.

It is an arithmetic number, because the mean of its divisors is an integer number (26318439).

Almost surely, 2^205006566 is an apocalyptic number.

205006566 is an abundant number, since it is smaller than the sum of its proper divisors (216088458).

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

205006566 is a wasteful number, since it uses less digits than its factorization.

205006566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923495.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 205006566 is about 14318.0503561064. The cubic root of 205006566 is about 589.6431491422.

The spelling of 205006566 in words is "two hundred five million, six thousand, five hundred sixty-six".