2566240236 has 216 divisors, whose sum is σ = 7960033536. Its totient is φ = 682698240.

The previous prime is 2566240217. The next prime is 2566240241. The reversal of 2566240236 is 6320426652.

2566240236 is a `hidden beast` number, since 2 + 5 + 6 + 624 + 0 + 23 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2566240236.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12162171 + ... + 12162381.

Almost surely, 2^2566240236 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 2566240236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3980016768).

2566240236 is an abundant number, since it is smaller than the sum of its proper divisors (5393793300).

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

2566240236 is a wasteful number, since it uses less digits than its factorization.

2566240236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 2566240236 is about 50658.0717753844. The cubic root of 2566240236 is about 1369.0913818153.

Adding to 2566240236 its reverse (6320426652), we get a palindrome (8886666888).

The spelling of 2566240236 in words is "two billion, five hundred sixty-six million, two hundred forty thousand, two hundred thirty-six".