6623161 has 4 divisors (see below), whose sum is σ = 6777232. Its totient is φ = 6469092.

The previous prime is 6623159. The next prime is 6623171. The reversal of 6623161 is 1613266.

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 not a de Polignac number, because 6623161 - 2¹ = 6623159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6623101) 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 3 ways as a sum of consecutive naturals, for example, 76971 + ... + 77056.

It is an arithmetic number, because the mean of its divisors is an integer number (1694308).

Almost surely, 2^6623161 is an apocalyptic number.

It is an amenable number.

6623161 is a deficient number, since it is larger than the sum of its proper divisors (154071).

6623161 is a wasteful number, since it uses less digits than its factorization.

6623161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154070.

The product of its digits is 1296, while the sum is 25.

The square root of 6623161 is about 2573.5502715121. The cubic root of 6623161 is about 187.7969079657.

It can be divided in two parts, 66 and 23161, that multiplied together give a triangular number (1528626 = T₁₇₄₈).

The spelling of 6623161 in words is "six million, six hundred twenty-three thousand, one hundred sixty-one".