1660445 has 8 divisors (see below), whose sum is σ = 2039136. Its totient is φ = 1297296.

The previous prime is 1660433. The next prime is 1660457. The reversal of 1660445 is 5440661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1660433) and next prime (1660457).

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

It is a cyclic number.

It is not a de Polignac number, because 1660445 - 2⁸ = 1660189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3647 + ... + 4076.

It is an arithmetic number, because the mean of its divisors is an integer number (254892).

2^1660445 is an apocalyptic number.

It is an amenable number.

1660445 is a deficient number, since it is larger than the sum of its proper divisors (378691).

1660445 is an equidigital number, since it uses as much as digits as its factorization.

1660445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1660445 is about 1288.5825545924. The cubic root of 1660445 is about 118.4153941589.

The spelling of 1660445 in words is "one million, six hundred sixty thousand, four hundred forty-five".