161716706 has 4 divisors (see below), whose sum is σ = 242575062. Its totient is φ = 80858352.

The previous prime is 161716691. The next prime is 161716717. The reversal of 161716706 is 607617161.

161716706 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: 607617161 = 157 ⋅3870173.

It can be written as a sum of positive squares in only one way, i.e., 161518681 + 198025 = 12709^2 + 445^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40429175 + ... + 40429178.

Almost surely, 2^161716706 is an apocalyptic number.

161716706 is a deficient number, since it is larger than the sum of its proper divisors (80858356).

161716706 is an equidigital number, since it uses as much as digits as its factorization.

161716706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80858355.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 161716706 is about 12716.7883524104. The cubic root of 161716706 is about 544.8182274034.

The spelling of 161716706 in words is "one hundred sixty-one million, seven hundred sixteen thousand, seven hundred six".