6699220 has 48 divisors (see below), whose sum is σ = 15781248. Its totient is φ = 2367360.

The previous prime is 6699211. The next prime is 6699221. The reversal of 6699220 is 229966.

6699220 = T₈₀ + T₈₁ + ... + T₃₄₃.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7729 + ... + 8551.

It is an arithmetic number, because the mean of its divisors is an integer number (328776).

Almost surely, 2^6699220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6699220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7890624).

6699220 is an abundant number, since it is smaller than the sum of its proper divisors (9082028).

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

6699220 is a wasteful number, since it uses less digits than its factorization.

6699220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 6699220 is about 2588.2851465787. The cubic root of 6699220 is about 188.5130471026.

It can be divided in two parts, 669 and 9220, that added together give a palindrome (9889).

The spelling of 6699220 in words is "six million, six hundred ninety-nine thousand, two hundred twenty".