1841666 has 4 divisors (see below), whose sum is σ = 2762502. Its totient is φ = 920832.

The previous prime is 1841659. The next prime is 1841681. The reversal of 1841666 is 6661481.

It is a happy number.

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., 1380625 + 461041 = 1175^2 + 679^2 .

It is an Ulam number.

It is a Curzon number.

It is an unprimeable 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, 460415 + ... + 460418.

2^1841666 is an apocalyptic number.

1841666 is a deficient number, since it is larger than the sum of its proper divisors (920836).

1841666 is an equidigital number, since it uses as much as digits as its factorization.

1841666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920835.

The product of its digits is 6912, while the sum is 32.

The square root of 1841666 is about 1357.0799534294. The cubic root of 1841666 is about 122.5754858922.

The spelling of 1841666 in words is "one million, eight hundred forty-one thousand, six hundred sixty-six".