266040216 has 48 divisors (see below), whose sum is σ = 775953360. Its totient is φ = 81858240.

The previous prime is 266040211. The next prime is 266040217. The reversal of 266040216 is 612040662.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 266040216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266040211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141180 + ... + 143051.

It is an arithmetic number, because the mean of its divisors is an integer number (16165695).

Almost surely, 2^266040216 is an apocalyptic number.

266040216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

266040216 is an abundant number, since it is smaller than the sum of its proper divisors (509913144).

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

266040216 is a wasteful number, since it uses less digits than its factorization.

266040216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284256 (or 284249 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 266040216 is about 16310.7392842875. The cubic root of 266040216 is about 643.1551683128.

Adding to 266040216 its reverse (612040662), we get a palindrome (878080878).

It can be divided in two parts, 266040 and 216, that added together give a square (266256 = 516²).

The spelling of 266040216 in words is "two hundred sixty-six million, forty thousand, two hundred sixteen".