266695872 has 56 divisors (see below), whose sum is σ = 707843136. Its totient is φ = 88620288.

The previous prime is 266695823. The next prime is 266695901. The reversal of 266695872 is 278596662.

It is a super-2 number, since 2×266695872² = 142253376283680768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64623 + ... + 68625.

It is an arithmetic number, because the mean of its divisors is an integer number (12640056).

Almost surely, 2^266695872 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 266695872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353921568).

266695872 is an abundant number, since it is smaller than the sum of its proper divisors (441147264).

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

266695872 is a wasteful number, since it uses less digits than its factorization.

266695872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4365 (or 4355 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The square root of 266695872 is about 16330.8258211274. The cubic root of 266695872 is about 643.6830867454.

The spelling of 266695872 in words is "two hundred sixty-six million, six hundred ninety-five thousand, eight hundred seventy-two".