266475906 has 40 divisors (see below), whose sum is σ = 599102460. Its totient is φ = 88528032.

The previous prime is 266475889. The next prime is 266475941. The reversal of 266475906 is 609574662.

It can be written as a sum of positive squares in 2 ways, for example, as 262731681 + 3744225 = 16209^2 + 1935^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 48760 + ... + 53948.

Almost surely, 2^266475906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266475906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299551230).

266475906 is an abundant number, since it is smaller than the sum of its proper divisors (332626554).

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

266475906 is a wasteful number, since it uses less digits than its factorization.

266475906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5520 (or 5511 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 266475906 is about 16324.0897449138. The cubic root of 266475906 is about 643.5060719593.

The spelling of 266475906 in words is "two hundred sixty-six million, four hundred seventy-five thousand, nine hundred six".