266663748 has 72 divisors (see below), whose sum is σ = 703176768. Its totient is φ = 78469248.

The previous prime is 266663743. The next prime is 266663753. The reversal of 266663748 is 847366662.

It is an interprime number because it is at equal distance from previous prime (266663743) and next prime (266663753).

It is a super-2 number, since 2×266663748² = 142219108994815008, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266663697 and 266663706.

It is not an unprimeable number, because it can be changed into a prime (266663741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43786 + ... + 49502.

It is an arithmetic number, because the mean of its divisors is an integer number (9766344).

Almost surely, 2^266663748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266663748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351588384).

266663748 is an abundant number, since it is smaller than the sum of its proper divisors (436513020).

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

266663748 is a wasteful number, since it uses less digits than its factorization.

266663748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5773 (or 5758 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 48.

The square root of 266663748 is about 16329.8422527592. The cubic root of 266663748 is about 643.6572414438.

The spelling of 266663748 in words is "two hundred sixty-six million, six hundred sixty-three thousand, seven hundred forty-eight".