2566204650 has 72 divisors (see below), whose sum is σ = 6940989900. Its totient is φ = 679710720.

The previous prime is 2566204649. The next prime is 2566204661. The reversal of 2566204650 is 564026652.

2566204650 is a `hidden beast` number, since 2 + 566 + 2 + 0 + 46 + 50 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 949440969 + 1616763681 = 30813^2 + 40209^2 .

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 35 ways as a sum of consecutive naturals, for example, 47914 + ... + 86186.

Almost surely, 2^2566204650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2566204650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3470494950).

2566204650 is an abundant number, since it is smaller than the sum of its proper divisors (4374785250).

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

2566204650 is a wasteful number, since it uses less digits than its factorization.

2566204650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38440 (or 38432 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 2566204650 is about 50657.7205369527. The cubic root of 2566204650 is about 1369.0850533988.

The spelling of 2566204650 in words is "two billion, five hundred sixty-six million, two hundred four thousand, six hundred fifty".