6166221 has 8 divisors (see below), whose sum is σ = 8235360. Its totient is φ = 4103952.

The previous prime is 6166219. The next prime is 6166247. The reversal of 6166221 is 1226616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6166221 - 2¹ = 6166219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6166191 and 6166200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6166261) 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 7 ways as a sum of consecutive naturals, for example, 990 + ... + 3648.

It is an arithmetic number, because the mean of its divisors is an integer number (1029420).

Almost surely, 2^6166221 is an apocalyptic number.

It is an amenable number.

6166221 is a deficient number, since it is larger than the sum of its proper divisors (2069139).

6166221 is a wasteful number, since it uses less digits than its factorization.

6166221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3435.

The product of its digits is 864, while the sum is 24.

The square root of 6166221 is about 2483.1876691060. The cubic root of 6166221 is about 183.3748177931.

The spelling of 6166221 in words is "six million, one hundred sixty-six thousand, two hundred twenty-one".