6650161 has 4 divisors (see below), whose sum is σ = 7600192. Its totient is φ = 5700132.

The previous prime is 6650153. The next prime is 6650207. The reversal of 6650161 is 1610566.

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 6650161 - 2³ = 6650153 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6650131) 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, 475005 + ... + 475018.

It is an arithmetic number, because the mean of its divisors is an integer number (1900048).

Almost surely, 2^6650161 is an apocalyptic number.

It is an amenable number.

6650161 is a deficient number, since it is larger than the sum of its proper divisors (950031).

6650161 is an equidigital number, since it uses as much as digits as its factorization.

6650161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950030.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 6650161 is about 2578.7906080176. The cubic root of 6650161 is about 188.0517531429.

Adding to 6650161 its product of nonzero digits (1080), we get a square (6651241 = 2579²).

The spelling of 6650161 in words is "six million, six hundred fifty thousand, one hundred sixty-one".