1666338 has 32 divisors (see below), whose sum is σ = 3594240. Its totient is φ = 513360.

The previous prime is 1666321. The next prime is 1666339. The reversal of 1666338 is 8336661.

It is a junction number, because it is equal to n+sod(n) for n = 1666299 and 1666308.

It is not an unprimeable number, because it can be changed into a prime (1666339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5203 + ... + 5513.

It is an arithmetic number, because the mean of its divisors is an integer number (112320).

2^1666338 is an apocalyptic number.

1666338 is an abundant number, since it is smaller than the sum of its proper divisors (1927902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666338 is a wasteful number, since it uses less digits than its factorization.

1666338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382.

The product of its digits is 15552, while the sum is 33.

The square root of 1666338 is about 1290.8671504070. The cubic root of 1666338 is about 118.5553160889. Note that the first 3 decimals are identical.

The spelling of 1666338 in words is "one million, six hundred sixty-six thousand, three hundred thirty-eight".