220206256566 has 32 divisors (see below), whose sum is σ = 445465536768. Its totient is φ = 72562178400.

The previous prime is 220206256549. The next prime is 220206256573. The reversal of 220206256566 is 665652602022.

220206256566 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 2×220206256566² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 107095 + ... + 672221.

It is an arithmetic number, because the mean of its divisors is an integer number (13920798024).

Almost surely, 2^220206256566 is an apocalyptic number.

220206256566 is an abundant number, since it is smaller than the sum of its proper divisors (225259280202).

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

220206256566 is a wasteful number, since it uses less digits than its factorization.

220206256566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565876.

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 220206256566 its reverse (665652602022), we get a palindrome (885858858588).

The spelling of 220206256566 in words is "two hundred twenty billion, two hundred six million, two hundred fifty-six thousand, five hundred sixty-six".