1745666 has 8 divisors (see below), whose sum is σ = 2819964. Its totient is φ = 805680.

The previous prime is 1745647. The next prime is 1745669. The reversal of 1745666 is 6665471.

It can be written as a sum of positive squares in 2 ways, for example, as 1745041 + 625 = 1321^2 + 25^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1745669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33545 + ... + 33596.

2^1745666 is an apocalyptic number.

1745666 is a deficient number, since it is larger than the sum of its proper divisors (1074298).

1745666 is a wasteful number, since it uses less digits than its factorization.

1745666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67156.

The product of its digits is 30240, while the sum is 35.

The square root of 1745666 is about 1321.2365420317. The cubic root of 1745666 is about 120.4075494801.

The spelling of 1745666 in words is "one million, seven hundred forty-five thousand, six hundred sixty-six".