1666341 has 6 divisors (see below), whose sum is σ = 2406950. Its totient is φ = 1110888.

The previous prime is 1666339. The next prime is 1666351. The reversal of 1666341 is 1436661.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 715716 = 975^2 + 846^2 .

It is not a de Polignac number, because 1666341 - 2¹ = 1666339 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92566 + ... + 92583.

2^1666341 is an apocalyptic number.

It is an amenable number.

1666341 is a deficient number, since it is larger than the sum of its proper divisors (740609).

1666341 is a wasteful number, since it uses less digits than its factorization.

1666341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185155 (or 185152 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1666341 is about 1290.8683124161. The cubic root of 1666341 is about 118.5553872361. Note that the first 3 decimals are identical.

The spelling of 1666341 in words is "one million, six hundred sixty-six thousand, three hundred forty-one".