1601066161 has 2 divisors, whose sum is σ = 1601066162. Its totient is φ = 1601066160.

The previous prime is 1601066153. The next prime is 1601066167. The reversal of 1601066161 is 1616601061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1588421025 + 12645136 = 39855^2 + 3556^2 .

It is an emirp because it is prime and its reverse (1616601061) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1919901091 and 1901099191.

It is a cyclic number.

It is not a de Polignac number, because 1601066161 - 2³ = 1601066153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1601066167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800533080 + 800533081.

It is an arithmetic number, because the mean of its divisors is an integer number (800533081).

Almost surely, 2^1601066161 is an apocalyptic number.

It is an amenable number.

1601066161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601066161 is an equidigital number, since it uses as much as digits as its factorization.

1601066161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1601066161 is about 40013.3247931236. The cubic root of 1601066161 is about 1169.8668270759.

The spelling of 1601066161 in words is "one billion, six hundred one million, sixty-six thousand, one hundred sixty-one".