1661163 has 8 divisors (see below), whose sum is σ = 2531328. Its totient is φ = 949224.

The previous prime is 1661161. The next prime is 1661173. The reversal of 1661163 is 3611661.

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

It is not a de Polignac number, because 1661163 - 2¹ = 1661161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1661161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39531 + ... + 39572.

It is an arithmetic number, because the mean of its divisors is an integer number (316416).

2^1661163 is an apocalyptic number.

1661163 is a deficient number, since it is larger than the sum of its proper divisors (870165).

1661163 is an equidigital number, since it uses as much as digits as its factorization.

1661163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79113.

The product of its digits is 648, while the sum is 24.

The square root of 1661163 is about 1288.8611251799. The cubic root of 1661163 is about 118.4324598654.

The spelling of 1661163 in words is "one million, six hundred sixty-one thousand, one hundred sixty-three".