6556669 has 4 divisors (see below), whose sum is σ = 7493344. Its totient is φ = 5619996.

The previous prime is 6556657. The next prime is 6556673. The reversal of 6556669 is 9666556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6556669 - 2¹¹ = 6554621 is a prime.

It is a super-2 number, since 2×6556669² = 85979816751122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556609) 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 3 ways as a sum of consecutive naturals, for example, 468327 + ... + 468340.

It is an arithmetic number, because the mean of its divisors is an integer number (1873336).

Almost surely, 2^6556669 is an apocalyptic number.

It is an amenable number.

6556669 is a deficient number, since it is larger than the sum of its proper divisors (936675).

6556669 is an equidigital number, since it uses as much as digits as its factorization.

6556669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936674.

The product of its digits is 291600, while the sum is 43.

The square root of 6556669 is about 2560.5993439037. The cubic root of 6556669 is about 187.1663423095.

It can be divided in two parts, 6556 and 669, that added together give a square (7225 = 85²).

The spelling of 6556669 in words is "six million, five hundred fifty-six thousand, six hundred sixty-nine".