6772220 has 72 divisors (see below), whose sum is σ = 17795232. Its totient is φ = 2108160.

The previous prime is 6772211. The next prime is 6772223. The reversal of 6772220 is 222776.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 6772220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6772223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110990 + ... + 111050.

It is an arithmetic number, because the mean of its divisors is an integer number (247156).

Almost surely, 2^6772220 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 6772220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8897616).

6772220 is an abundant number, since it is smaller than the sum of its proper divisors (11023012).

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

6772220 is a wasteful number, since it uses less digits than its factorization.

6772220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 6772220 is about 2602.3489389396. The cubic root of 6772220 is about 189.1953040237.

Adding to 6772220 its reverse (222776), we get a palindrome (6994996).

The spelling of 6772220 in words is "six million, seven hundred seventy-two thousand, two hundred twenty".