1666141 has 4 divisors (see below), whose sum is σ = 1668832. Its totient is φ = 1663452.

The previous prime is 1666139. The next prime is 1666151. The reversal of 1666141 is 1416661.

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 1666141 - 2¹ = 1666139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666111) 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, 106 + ... + 1828.

It is an arithmetic number, because the mean of its divisors is an integer number (417208).

2^1666141 is an apocalyptic number.

It is an amenable number.

1666141 is a deficient number, since it is larger than the sum of its proper divisors (2691).

1666141 is an equidigital number, since it uses as much as digits as its factorization.

1666141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690.

The product of its digits is 864, while the sum is 25.

The square root of 1666141 is about 1290.7908428557. The cubic root of 1666141 is about 118.5506439040.

The spelling of 1666141 in words is "one million, six hundred sixty-six thousand, one hundred forty-one".