5566401 has 12 divisors (see below), whose sum is σ = 8338512. Its totient is φ = 3710772.

The previous prime is 5566399. The next prime is 5566403. The reversal of 5566401 is 1046655.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5566399) and next prime (5566403).

It is not a de Polignac number, because 5566401 - 2¹ = 5566399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (5566403) 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, 11211 + ... + 11696.

It is an arithmetic number, because the mean of its divisors is an integer number (694876).

Almost surely, 2^5566401 is an apocalyptic number.

It is an amenable number.

5566401 is a deficient number, since it is larger than the sum of its proper divisors (2772111).

5566401 is an equidigital number, since it uses as much as digits as its factorization.

5566401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22922 (or 22910 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 5566401 is about 2359.3221484147. The cubic root of 5566401 is about 177.2249366601.

The spelling of 5566401 in words is "five million, five hundred sixty-six thousand, four hundred one".