6566161 has 4 divisors (see below), whose sum is σ = 7504192. Its totient is φ = 5628132.

The previous prime is 6566089. The next prime is 6566171. The reversal of 6566161 is 1616656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6566161 - 2⁷ = 6566033 is a prime.

It is a super-2 number, since 2×6566161² = 86228940555842, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (6566171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469005 + ... + 469018.

It is an arithmetic number, because the mean of its divisors is an integer number (1876048).

Almost surely, 2^6566161 is an apocalyptic number.

It is an amenable number.

6566161 is a deficient number, since it is larger than the sum of its proper divisors (938031).

6566161 is an equidigital number, since it uses as much as digits as its factorization.

6566161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938030.

The product of its digits is 6480, while the sum is 31.

The square root of 6566161 is about 2562.4521458946. The cubic root of 6566161 is about 187.2566181441.

The spelling of 6566161 in words is "six million, five hundred sixty-six thousand, one hundred sixty-one".