160911661 has 4 divisors (see below), whose sum is σ = 162335772. Its totient is φ = 159487552.

The previous prime is 160911649. The next prime is 160911677. The reversal of 160911661 is 166119061.

It is a happy number.

160911661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166119061 = 5503 ⋅30187.

It can be written as a sum of positive squares in 2 ways, for example, as 1394761 + 159516900 = 1181^2 + 12630^2 .

It is a cyclic number.

It is not a de Polignac number, because 160911661 - 2⁷ = 160911533 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 (160911601) 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, 711886 + ... + 712111.

It is an arithmetic number, because the mean of its divisors is an integer number (40583943).

Almost surely, 2^160911661 is an apocalyptic number.

It is an amenable number.

160911661 is a deficient number, since it is larger than the sum of its proper divisors (1424111).

160911661 is a wasteful number, since it uses less digits than its factorization.

160911661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424110.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 160911661 is about 12685.0960185566. The cubic root of 160911661 is about 543.9126664247.

The spelling of 160911661 in words is "one hundred sixty million, nine hundred eleven thousand, six hundred sixty-one".