1066685 has 4 divisors (see below), whose sum is σ = 1280028. Its totient is φ = 853344.

The previous prime is 1066669. The next prime is 1066687. The reversal of 1066685 is 5866601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5866601 = 13 ⋅451277.

It can be written as a sum of positive squares in 2 ways, for example, as 244036 + 822649 = 494^2 + 907^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066685 - 2⁴ = 1066669 is a prime.

It is a super-2 number, since 2×1066685² = 2275633778450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066687) 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, 106664 + ... + 106673.

It is an arithmetic number, because the mean of its divisors is an integer number (320007).

2^1066685 is an apocalyptic number.

It is an amenable number.

1066685 is a deficient number, since it is larger than the sum of its proper divisors (213343).

1066685 is an equidigital number, since it uses as much as digits as its factorization.

1066685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213342.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1066685 is about 1032.8044345373. The cubic root of 1066685 is about 102.1751763577.

The spelling of 1066685 in words is "one million, sixty-six thousand, six hundred eighty-five".