1666322 has 16 divisors (see below), whose sum is σ = 2927232. Its totient is φ = 696480.

The previous prime is 1666321. The next prime is 1666339. The reversal of 1666322 is 2236661.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1666291 and 1666300.

It is not an unprimeable number, because it can be changed into a prime (1666321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 878 + ... + 2025.

It is an arithmetic number, because the mean of its divisors is an integer number (182952).

2^1666322 is an apocalyptic number.

1666322 is a deficient number, since it is larger than the sum of its proper divisors (1260910).

1666322 is a wasteful number, since it uses less digits than its factorization.

1666322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953.

The product of its digits is 2592, while the sum is 26.

The square root of 1666322 is about 1290.8609530077. The cubic root of 1666322 is about 118.5549366358.

The spelling of 1666322 in words is "one million, six hundred sixty-six thousand, three hundred twenty-two".