422666 has 4 divisors (see below), whose sum is σ = 634002. Its totient is φ = 211332.

The previous prime is 422657. The next prime is 422689. The reversal of 422666 is 666224.

422666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 390625 + 32041 = 625^2 + 179^2 .

422666 is a modest number, since divided by 666 gives 422 as remainder.

It is a Curzon number.

It is an unprimeable number.

422666 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105665 + ... + 105668.

2⁴²²⁶⁶⁶ is an apocalyptic number.

422666 is a deficient number, since it is larger than the sum of its proper divisors (211336).

422666 is a wasteful number, since it uses less digits than its factorization.

422666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211335.

The product of its digits is 3456, while the sum is 26.

The square root of 422666 is about 650.1276797676. The cubic root of 422666 is about 75.0468448088.

The spelling of 422666 in words is "four hundred twenty-two thousand, six hundred sixty-six".