266441406 has 64 divisors (see below), whose sum is σ = 667408896. Its totient is φ = 68889600.

The previous prime is 266441393. The next prime is 266441419. The reversal of 266441406 is 604144662.

It is an interprime number because it is at equal distance from previous prime (266441393) and next prime (266441419).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 110146 + ... + 112538.

It is an arithmetic number, because the mean of its divisors is an integer number (10428264).

Almost surely, 2^266441406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266441406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333704448).

266441406 is an abundant number, since it is smaller than the sum of its proper divisors (400967490).

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

266441406 is a wasteful number, since it uses less digits than its factorization.

266441406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 266441406 is about 16323.0329902258. The cubic root of 266441406 is about 643.4782996952.

The spelling of 266441406 in words is "two hundred sixty-six million, four hundred forty-one thousand, four hundred six".