2566446651 has 24 divisors (see below), whose sum is σ = 3972827040. Its totient is φ = 1592338176.

The previous prime is 2566446647. The next prime is 2566446671. The reversal of 2566446651 is 1566446652.

It is not a de Polignac number, because 2566446651 - 2² = 2566446647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2566446597 and 2566446606.

It is not an unprimeable number, because it can be changed into a prime (2566446671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159886 + ... + 175203.

It is an arithmetic number, because the mean of its divisors is an integer number (165534460).

Almost surely, 2^2566446651 is an apocalyptic number.

2566446651 is a deficient number, since it is larger than the sum of its proper divisors (1406380389).

2566446651 is a wasteful number, since it uses less digits than its factorization.

2566446651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335155 (or 335152 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 2566446651 is about 50660.1090701550. The cubic root of 2566446651 is about 1369.1280883581.

Subtracting from 2566446651 its reverse (1566446652), we obtain a palindrome (999999999).

The spelling of 2566446651 in words is "two billion, five hundred sixty-six million, four hundred forty-six thousand, six hundred fifty-one".