161662 has 4 divisors (see below), whose sum is σ = 242496. Its totient is φ = 80830.

The previous prime is 161659. The next prime is 161683. The reversal of 161662 is 266161.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×161662² = 52269204488, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

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, 40414 + ... + 40417.

It is an arithmetic number, because the mean of its divisors is an integer number (60624).

2¹⁶¹⁶⁶² is an apocalyptic number.

161662 is a deficient number, since it is larger than the sum of its proper divisors (80834).

161662 is an equidigital number, since it uses as much as digits as its factorization.

161662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80833.

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

The square root of 161662 is about 402.0721328319. The cubic root of 161662 is about 54.4756786241.

The spelling of 161662 in words is "one hundred sixty-one thousand, six hundred sixty-two".