662161 has 4 divisors (see below), whose sum is σ = 672112. Its totient is φ = 652212.

The previous prime is 662149. The next prime is 662177. The reversal of 662161 is 161266.

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 662161 - 2¹³ = 653969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662111) 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, 4875 + ... + 5008.

It is an arithmetic number, because the mean of its divisors is an integer number (168028).

2⁶⁶²¹⁶¹ is an apocalyptic number.

It is an amenable number.

662161 is a deficient number, since it is larger than the sum of its proper divisors (9951).

662161 is an equidigital number, since it uses as much as digits as its factorization.

662161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9950.

The product of its digits is 432, while the sum is 22.

The square root of 662161 is about 813.7327571138. The cubic root of 662161 is about 87.1607983177.

The spelling of 662161 in words is "six hundred sixty-two thousand, one hundred sixty-one".