266247216 has 40 divisors (see below), whose sum is σ = 764229360. Its totient is φ = 88748928.

The previous prime is 266247181. The next prime is 266247221. The reversal of 266247216 is 612742662.

266247216 is a `hidden beast` number, since 2 + 6 + 624 + 7 + 21 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307725 + ... + 308588.

It is an arithmetic number, because the mean of its divisors is an integer number (19105734).

Almost surely, 2^266247216 is an apocalyptic number.

It is an amenable number.

266247216 is an abundant number, since it is smaller than the sum of its proper divisors (497982144).

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

266247216 is a wasteful number, since it uses less digits than its factorization.

266247216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616330 (or 616318 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 266247216 is about 16317.0835629410. The cubic root of 266247216 is about 643.3219333324.

Adding to 266247216 its reverse (612742662), we get a palindrome (878989878).

The spelling of 266247216 in words is "two hundred sixty-six million, two hundred forty-seven thousand, two hundred sixteen".