6669558 has 48 divisors (see below), whose sum is σ = 16912896. Its totient is φ = 1859760.

The previous prime is 6669547. The next prime is 6669587. The reversal of 6669558 is 8559666.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4803 + ... + 6033.

It is an arithmetic number, because the mean of its divisors is an integer number (352352).

Almost surely, 2^6669558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6669558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8456448).

6669558 is an abundant number, since it is smaller than the sum of its proper divisors (10243338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6669558 is a wasteful number, since it uses less digits than its factorization.

6669558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289 (or 1286 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 6669558 is about 2582.5487410696. The cubic root of 6669558 is about 188.2344103321.

It can be divided in two parts, 6669 and 558, that added together give a palindrome (7227).

The spelling of 6669558 in words is "six million, six hundred sixty-nine thousand, five hundred fifty-eight".