2555566 has 16 divisors (see below), whose sum is σ = 4155984. Its totient is φ = 1171584.

The previous prime is 2555561. The next prime is 2555569. The reversal of 2555566 is 6655552.

It is a happy number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5686 + ... + 6118.

It is an arithmetic number, because the mean of its divisors is an integer number (259749).

2^2555566 is an apocalyptic number.

2555566 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2555566 is a deficient number, since it is larger than the sum of its proper divisors (1600418).

2555566 is a wasteful number, since it uses less digits than its factorization.

2555566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675.

The product of its digits is 45000, while the sum is 34.

The square root of 2555566 is about 1598.6137744934. The cubic root of 2555566 is about 136.7190505778.

The spelling of 2555566 in words is "two million, five hundred fifty-five thousand, five hundred sixty-six".