161114665 has 4 divisors (see below), whose sum is σ = 193337604. Its totient is φ = 128891728.

The previous prime is 161114659. The next prime is 161114671. The reversal of 161114665 is 566411161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566411161 = 73 ⋅7759057.

It is an interprime number because it is at equal distance from previous prime (161114659) and next prime (161114671).

It can be written as a sum of positive squares in 2 ways, for example, as 71301136 + 89813529 = 8444^2 + 9477^2 .

It is a cyclic number.

It is not a de Polignac number, because 161114665 - 2⁹ = 161114153 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16111462 + ... + 16111471.

It is an arithmetic number, because the mean of its divisors is an integer number (48334401).

Almost surely, 2^161114665 is an apocalyptic number.

It is an amenable number.

161114665 is a deficient number, since it is larger than the sum of its proper divisors (32222939).

161114665 is an equidigital number, since it uses as much as digits as its factorization.

161114665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32222938.

The product of its digits is 4320, while the sum is 31.

The square root of 161114665 is about 12693.0951702097. The cubic root of 161114665 is about 544.1413012865.

The spelling of 161114665 in words is "one hundred sixty-one million, one hundred fourteen thousand, six hundred sixty-five".