660050161 has 2 divisors, whose sum is σ = 660050162. Its totient is φ = 660050160.

The previous prime is 660050147. The next prime is 660050189. The reversal of 660050161 is 161050066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 554885136 + 105165025 = 23556^2 + 10255^2 .

It is a cyclic number.

It is not a de Polignac number, because 660050161 - 2¹¹ = 660048113 is a prime.

It is a super-2 number, since 2×660050161² = 871332430072251842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (660050761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330025080 + 330025081.

It is an arithmetic number, because the mean of its divisors is an integer number (330025081).

Almost surely, 2^660050161 is an apocalyptic number.

It is an amenable number.

660050161 is a deficient number, since it is larger than the sum of its proper divisors (1).

660050161 is an equidigital number, since it uses as much as digits as its factorization.

660050161 is an evil number, because the sum of its binary digits is even.

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

The square root of 660050161 is about 25691.4413959202. The cubic root of 660050161 is about 870.6808256871.

The spelling of 660050161 in words is "six hundred sixty million, fifty thousand, one hundred sixty-one".