5566663 has 2 divisors, whose sum is σ = 5566664. Its totient is φ = 5566662.

The previous prime is 5566661. The next prime is 5566669. The reversal of 5566663 is 3666655.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5566663 - 2¹ = 5566661 is a prime.

Together with 5566661, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5566661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2783331 + 2783332.

It is an arithmetic number, because the mean of its divisors is an integer number (2783332).

Almost surely, 2^5566663 is an apocalyptic number.

5566663 is a deficient number, since it is larger than the sum of its proper divisors (1).

5566663 is an equidigital number, since it uses as much as digits as its factorization.

5566663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 37.

The square root of 5566663 is about 2359.3776721839. The cubic root of 5566663 is about 177.2277171644.

The spelling of 5566663 in words is "five million, five hundred sixty-six thousand, six hundred sixty-three".