161066177 has 4 divisors (see below), whose sum is σ = 170540676. Its totient is φ = 151591680.

The previous prime is 161066161. The next prime is 161066179. The reversal of 161066177 is 771660161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 771660161 = 569 ⋅1356169.

It can be written as a sum of positive squares in 2 ways, for example, as 131079601 + 29986576 = 11449^2 + 5476^2 .

It is a cyclic number.

It is not a de Polignac number, because 161066177 - 2⁴ = 161066161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161066179) by changing a digit.

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, 4737224 + ... + 4737257.

It is an arithmetic number, because the mean of its divisors is an integer number (42635169).

Almost surely, 2^161066177 is an apocalyptic number.

161066177 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

161066177 is a deficient number, since it is larger than the sum of its proper divisors (9474499).

161066177 is an equidigital number, since it uses as much as digits as its factorization.

161066177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9474498.

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

The square root of 161066177 is about 12691.1850116528. The cubic root of 161066177 is about 544.0867087583.

The spelling of 161066177 in words is "one hundred sixty-one million, sixty-six thousand, one hundred seventy-seven".