1726666 has 8 divisors (see below), whose sum is σ = 2632644. Its totient is φ = 849120.

The previous prime is 1726661. The next prime is 1726667. The reversal of 1726666 is 6666271.

It can be written as a sum of positive squares in 2 ways, for example, as 1510441 + 216225 = 1229^2 + 465^2 .

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

It is a d-powerful number, because it can be written as 1 + 7³ + 2³ + 6 + 6² + 6⁶ + 6⁸ .

1726666 is a modest number, since divided by 6666 gives 172 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1726661) 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, 6955 + ... + 7198.

2^1726666 is an apocalyptic number.

1726666 is a deficient number, since it is larger than the sum of its proper divisors (905978).

1726666 is a wasteful number, since it uses less digits than its factorization.

1726666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14216.

The product of its digits is 18144, while the sum is 34.

The square root of 1726666 is about 1314.0266359553. The cubic root of 1726666 is about 119.9691124207.

The spelling of 1726666 in words is "one million, seven hundred twenty-six thousand, six hundred sixty-six".