266226620 has 96 divisors (see below), whose sum is σ = 627915456. Its totient is φ = 94786560.

The previous prime is 266226619. The next prime is 266226629. The reversal of 266226620 is 26622662.

It is a super-2 number, since 2×266226620² = 141753226393248800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266226629) by changing a digit.

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, 1943192 + ... + 1943328.

It is an arithmetic number, because the mean of its divisors is an integer number (6540786).

Almost surely, 2^266226620 is an apocalyptic number.

266226620 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 266226620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313957728).

266226620 is an abundant number, since it is smaller than the sum of its proper divisors (361688836).

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

266226620 is a wasteful number, since it uses less digits than its factorization.

266226620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 266226620 is about 16316.4524330505. The cubic root of 266226620 is about 643.3053444889.

The spelling of 266226620 in words is "two hundred sixty-six million, two hundred twenty-six thousand, six hundred twenty".