2566641 has 32 divisors (see below), whose sum is σ = 4386816. Its totient is φ = 1296000.

The previous prime is 2566637. The next prime is 2566651. The reversal of 2566641 is 1466652.

It is not a de Polignac number, because 2566641 - 2² = 2566637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2566599 and 2566608.

It is not an unprimeable number, because it can be changed into a prime (2566601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9336 + ... + 9606.

It is an arithmetic number, because the mean of its divisors is an integer number (137088).

2^2566641 is an apocalyptic number.

2566641 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2566641 is a deficient number, since it is larger than the sum of its proper divisors (1820175).

2566641 is a wasteful number, since it uses less digits than its factorization.

2566641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333.

The product of its digits is 8640, while the sum is 30.

The square root of 2566641 is about 1602.0739683298. The cubic root of 2566641 is about 136.9162647419.

It can be divided in two parts, 25 and 66641, that added together give a palindrome (66666).

The spelling of 2566641 in words is "two million, five hundred sixty-six thousand, six hundred forty-one".