266868992 has 144 divisors (see below), whose sum is σ = 625831920. Its totient is φ = 112459776.

The previous prime is 266868949. The next prime is 266868997. The reversal of 266868992 is 299868662.

It can be written as a sum of positive squares in 8 ways, for example, as 2611456 + 264257536 = 1616^2 + 16256^2 .

It is a super-3 number, since 3×266868992³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266868997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2998484 + ... + 2998572.

It is an arithmetic number, because the mean of its divisors is an integer number (4346055).

Almost surely, 2^266868992 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 266868992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312915960).

266868992 is an abundant number, since it is smaller than the sum of its proper divisors (358962928).

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

266868992 is a wasteful number, since it uses less digits than its factorization.

266868992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 174 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 56.

The square root of 266868992 is about 16336.1253668059. The cubic root of 266868992 is about 643.8223343861.

The spelling of 266868992 in words is "two hundred sixty-six million, eight hundred sixty-eight thousand, nine hundred ninety-two".