162661271 has 2 divisors, whose sum is σ = 162661272. Its totient is φ = 162661270.

The previous prime is 162661241. The next prime is 162661273. The reversal of 162661271 is 172166261.

It is a strong prime.

It is an emirp because it is prime and its reverse (172166261) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162661271 is a prime.

Together with 162661273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162661273) 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 as a sum of consecutive naturals, namely, 81330635 + 81330636.

It is an arithmetic number, because the mean of its divisors is an integer number (81330636).

Almost surely, 2^162661271 is an apocalyptic number.

162661271 is a deficient number, since it is larger than the sum of its proper divisors (1).

162661271 is an equidigital number, since it uses as much as digits as its factorization.

162661271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 162661271 is about 12753.8727843742. The cubic root of 162661271 is about 545.8769049433.

The spelling of 162661271 in words is "one hundred sixty-two million, six hundred sixty-one thousand, two hundred seventy-one".