266000220 has 96 divisors (see below), whose sum is σ = 830975040. Its totient is φ = 70640640.

The previous prime is 266000201. The next prime is 266000237. The reversal of 266000220 is 22000662.

266000220 is a `hidden beast` number, since 2 + 660 + 0 + 0 + 2 + 2 + 0 = 666.

It is a super-2 number, since 2×266000220² = 141512234080096800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 266000193 and 266000202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150864 + ... + 152616.

It is an arithmetic number, because the mean of its divisors is an integer number (8655990).

Almost surely, 2^266000220 is an apocalyptic number.

266000220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266000220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415487520).

266000220 is an abundant number, since it is smaller than the sum of its proper divisors (564974820).

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

266000220 is a wasteful number, since it uses less digits than its factorization.

266000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052 (or 2044 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 266000220 is about 16309.5131748314. The cubic root of 266000220 is about 643.1229364399.

Adding to 266000220 its reverse (22000662), we get a palindrome (288000882).

The spelling of 266000220 in words is "two hundred sixty-six million, two hundred twenty", and thus it is an aban number.