160066605661 has 2 divisors, whose sum is σ = 160066605662. Its totient is φ = 160066605660.

The previous prime is 160066605659. The next prime is 160066605763. The reversal of 160066605661 is 166506660061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151841929561 + 8224676100 = 389669^2 + 90690^2 .

It is a cyclic number.

It is not a de Polignac number, because 160066605661 - 2¹ = 160066605659 is a prime.

It is a super-3 number, since 3×160066605661³ (a number of 35 digits) contains 333 as substring.

Together with 160066605659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160066605961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80033302830 + 80033302831.

It is an arithmetic number, because the mean of its divisors is an integer number (80033302831).

Almost surely, 2^160066605661 is an apocalyptic number.

It is an amenable number.

160066605661 is a deficient number, since it is larger than the sum of its proper divisors (1).

160066605661 is an equidigital number, since it uses as much as digits as its factorization.

160066605661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 160066605661 in words is "one hundred sixty billion, sixty-six million, six hundred five thousand, six hundred sixty-one".