66622 has 4 divisors (see below), whose sum is σ = 99936. Its totient is φ = 33310.

The previous prime is 66617. The next prime is 66629. The reversal of 66622 is 22666.

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

It is a plaindrome in base 9.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66593 and 66602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66629) by changing a digit.

66622 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16654 + ... + 16657.

It is an arithmetic number, because the mean of its divisors is an integer number (24984).

2⁶⁶⁶²² is an apocalyptic number.

66622 is a deficient number, since it is larger than the sum of its proper divisors (33314).

66622 is a wasteful number, since it uses less digits than its factorization.

66622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33313.

The product of its digits is 864, while the sum is 22.

The square root of 66622 is about 258.1123786261. The cubic root of 66622 is about 40.5389555577.

Subtracting from 66622 its reverse (22666), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 66622 in words is "sixty-six thousand, six hundred twenty-two".