5566551 has 4 divisors (see below), whose sum is σ = 7422072. Its totient is φ = 3711032.

The previous prime is 5566543. The next prime is 5566553. The reversal of 5566551 is 1556655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5566551 - 2³ = 5566543 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5566553) 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, 927756 + ... + 927761.

It is an arithmetic number, because the mean of its divisors is an integer number (1855518).

Almost surely, 2^5566551 is an apocalyptic number.

5566551 is a deficient number, since it is larger than the sum of its proper divisors (1855521).

5566551 is a wasteful number, since it uses less digits than its factorization.

5566551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855520.

The product of its digits is 22500, while the sum is 33.

The square root of 5566551 is about 2359.3539369921. The cubic root of 5566551 is about 177.2265285626.

The spelling of 5566551 in words is "five million, five hundred sixty-six thousand, five hundred fifty-one".