1161666163 has 8 divisors (see below), whose sum is σ = 1350120960. Its totient is φ = 978837000.

The previous prime is 1161666139. The next prime is 1161666169. The reversal of 1161666163 is 3616661611.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161666163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161666169) 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, 1405963 + ... + 1406788.

It is an arithmetic number, because the mean of its divisors is an integer number (168765120).

Almost surely, 2^1161666163 is an apocalyptic number.

1161666163 is a deficient number, since it is larger than the sum of its proper divisors (188454797).

1161666163 is an equidigital number, since it uses as much as digits as its factorization.

1161666163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812817.

The product of its digits is 23328, while the sum is 37.

The square root of 1161666163 is about 34083.2240699145. The cubic root of 1161666163 is about 1051.2203989887.

The spelling of 1161666163 in words is "one billion, one hundred sixty-one million, six hundred sixty-six thousand, one hundred sixty-three".