2566556652 has 192 divisors, whose sum is σ = 6990939648. Its totient is φ = 731808000.

The previous prime is 2566556633. The next prime is 2566556669.

2566556652 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25411402 + ... + 25411502.

It is an arithmetic number, because the mean of its divisors is an integer number (36411144).

Almost surely, 2^2566556652 is an apocalyptic number.

2566556652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2566556652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3495469824).

2566556652 is an abundant number, since it is smaller than the sum of its proper divisors (4424382996).

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

2566556652 is a wasteful number, since it uses less digits than its factorization.

2566556652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 197 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 48.

The square root of 2566556652 is about 50661.1947352212. The cubic root of 2566556652 is about 1369.1476489059.

The spelling of 2566556652 in words is "two billion, five hundred sixty-six million, five hundred fifty-six thousand, six hundred fifty-two".