1660109 has 4 divisors (see below), whose sum is σ = 1811040. Its totient is φ = 1509180.

The previous prime is 1660103. The next prime is 1660111. The reversal of 1660109 is 9010661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1660109 - 2¹² = 1656013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660103) 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 3 ways as a sum of consecutive naturals, for example, 75449 + ... + 75470.

It is an arithmetic number, because the mean of its divisors is an integer number (452760).

2^1660109 is an apocalyptic number.

It is an amenable number.

1660109 is a deficient number, since it is larger than the sum of its proper divisors (150931).

1660109 is a wasteful number, since it uses less digits than its factorization.

1660109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150930.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1660109 is about 1288.4521721818. The cubic root of 1660109 is about 118.4074062889.

The spelling of 1660109 in words is "one million, six hundred sixty thousand, one hundred nine".