6766221 has 32 divisors (see below), whose sum is σ = 11916288. Its totient is φ = 3306240.

The previous prime is 6766219. The next prime is 6766231. The reversal of 6766221 is 1226676.

It is not a de Polignac number, because 6766221 - 2¹ = 6766219 is a prime.

6766221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6766211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3066 + ... + 4788.

It is an arithmetic number, because the mean of its divisors is an integer number (372384).

Almost surely, 2^6766221 is an apocalyptic number.

It is an amenable number.

6766221 is a deficient number, since it is larger than the sum of its proper divisors (5150067).

6766221 is a wasteful number, since it uses less digits than its factorization.

6766221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761.

The product of its digits is 6048, while the sum is 30.

The square root of 6766221 is about 2601.1960710412. The cubic root of 6766221 is about 189.1394228934.

The spelling of 6766221 in words is "six million, seven hundred sixty-six thousand, two hundred twenty-one".