2566621125 has 48 divisors (see below), whose sum is σ = 4685491200. Its totient is φ = 1351490400.

The previous prime is 2566621117. The next prime is 2566621153. The reversal of 2566621125 is 5211266652.

It is not a de Polignac number, because 2566621125 - 2³ = 2566621117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2566621125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74436 + ... + 103314.

It is an arithmetic number, because the mean of its divisors is an integer number (97614400).

Almost surely, 2^2566621125 is an apocalyptic number.

2566621125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2566621125 is a deficient number, since it is larger than the sum of its proper divisors (2118870075).

2566621125 is a wasteful number, since it uses less digits than its factorization.

2566621125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28979 (or 28966 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 2566621125 is about 50661.8310466568. The cubic root of 2566621125 is about 1369.1591133346.

Adding to 2566621125 its reverse (5211266652), we get a palindrome (7777887777).

The spelling of 2566621125 in words is "two billion, five hundred sixty-six million, six hundred twenty-one thousand, one hundred twenty-five".