122666 has 4 divisors (see below), whose sum is σ = 184002. Its totient is φ = 61332.

The previous prime is 122663. The next prime is 122693. The reversal of 122666 is 666221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666221 = 31 ⋅21491.

It can be written as a sum of positive squares in only one way, i.e., 70225 + 52441 = 265^2 + 229^2 .

122666 is a modest number, since divided by 666 gives 122 as remainder.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (122663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30665 + ... + 30668.

2¹²²⁶⁶⁶ is an apocalyptic number.

122666 is a deficient number, since it is larger than the sum of its proper divisors (61336).

122666 is an equidigital number, since it uses as much as digits as its factorization.

122666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61335.

The product of its digits is 864, while the sum is 23.

The square root of 122666 is about 350.2370625733. The cubic root of 122666 is about 49.6868427454.

Adding to 122666 its reverse (666221), we get a palindrome (788887).

The spelling of 122666 in words is "one hundred twenty-two thousand, six hundred sixty-six".