2568663 has 12 divisors (see below), whose sum is σ = 3871920. Its totient is φ = 1637856.

The previous prime is 2568659. The next prime is 2568673. The reversal of 2568663 is 3668652.

It is not a de Polignac number, because 2568663 - 2² = 2568659 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5998 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (322660).

2^2568663 is an apocalyptic number.

2568663 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2568663 is a deficient number, since it is larger than the sum of its proper divisors (1303257).

2568663 is a wasteful number, since it uses less digits than its factorization.

2568663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12438 (or 12435 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2568663 is about 1602.7049010969. The cubic root of 2568663 is about 136.9522095195.

The spelling of 2568663 in words is "two million, five hundred sixty-eight thousand, six hundred sixty-three".