2585663 has 4 divisors (see below), whose sum is σ = 2588880. Its totient is φ = 2582448.

The previous prime is 2585659. The next prime is 2585707. The reversal of 2585663 is 3665852.

It is a Cunningham number, because it is equal to 1608²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2585663 - 2² = 2585659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2585603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (647220).

2^2585663 is an apocalyptic number.

2585663 is a deficient number, since it is larger than the sum of its proper divisors (3217).

2585663 is a wasteful number, since it uses less digits than its factorization.

2585663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216.

The product of its digits is 43200, while the sum is 35.

The square root of 2585663 is about 1607.9996890547. Note that the first 3 decimals coincide. The cubic root of 2585663 is about 137.2536724730.

The spelling of 2585663 in words is "two million, five hundred eighty-five thousand, six hundred sixty-three".