1666233 has 6 divisors (see below), whose sum is σ = 2406794. Its totient is φ = 1110816.

The previous prime is 1666213. The next prime is 1666237. The reversal of 1666233 is 3326661.

It can be written as a sum of positive squares in only one way, i.e., 1447209 + 219024 = 1203^2 + 468^2 .

It is not a de Polignac number, because 1666233 - 2⁵ = 1666201 is a prime.

It is a Duffinian number.

1666233 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1666197 and 1666206.

It is not an unprimeable number, because it can be changed into a prime (1666237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92560 + ... + 92577.

2^1666233 is an apocalyptic number.

It is an amenable number.

1666233 is a deficient number, since it is larger than the sum of its proper divisors (740561).

1666233 is a wasteful number, since it uses less digits than its factorization.

1666233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185143 (or 185140 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 1666233 is about 1290.8264794309. The cubic root of 1666233 is about 118.5528258839.

The spelling of 1666233 in words is "one million, six hundred sixty-six thousand, two hundred thirty-three".