1666163 has 4 divisors (see below), whose sum is σ = 1675968. Its totient is φ = 1656360.

The previous prime is 1666151. The next prime is 1666177. The reversal of 1666163 is 3616661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1666163 - 2⁸ = 1665907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662163) 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, 4643 + ... + 4988.

It is an arithmetic number, because the mean of its divisors is an integer number (418992).

2^1666163 is an apocalyptic number.

1666163 is a deficient number, since it is larger than the sum of its proper divisors (9805).

1666163 is an equidigital number, since it uses as much as digits as its factorization.

1666163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9804.

The product of its digits is 3888, while the sum is 29.

The square root of 1666163 is about 1290.7993647349. The cubic root of 1666163 is about 118.5511656891.

The spelling of 1666163 in words is "one million, six hundred sixty-six thousand, one hundred sixty-three".