266760828 has 72 divisors (see below), whose sum is σ = 701116416. Its totient is φ = 85428000.

The previous prime is 266760803. The next prime is 266760829. The reversal of 266760828 is 828067662.

It is a happy number.

It is a super-2 number, since 2×266760828² = 142322678710491168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266760829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167725 + ... + 169307.

It is an arithmetic number, because the mean of its divisors is an integer number (9737728).

Almost surely, 2^266760828 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 266760828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350558208).

266760828 is an abundant number, since it is smaller than the sum of its proper divisors (434355588).

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

266760828 is a wasteful number, since it uses less digits than its factorization.

266760828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 266760828 is about 16332.8144543431. The cubic root of 266760828 is about 643.7353406283.

The spelling of 266760828 in words is "two hundred sixty-six million, seven hundred sixty thousand, eight hundred twenty-eight".