16610166161 has 2 divisors, whose sum is σ = 16610166162. Its totient is φ = 16610166160.

The previous prime is 16610166137. The next prime is 16610166241. The reversal of 16610166161 is 16166101661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13740528400 + 2869637761 = 117220^2 + 53569^2 .

It is a cyclic number.

It is not a de Polignac number, because 16610166161 - 2¹⁰ = 16610165137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16610366161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8305083080 + 8305083081.

It is an arithmetic number, because the mean of its divisors is an integer number (8305083081).

Almost surely, 2^16610166161 is an apocalyptic number.

It is an amenable number.

16610166161 is a deficient number, since it is larger than the sum of its proper divisors (1).

16610166161 is an equidigital number, since it uses as much as digits as its factorization.

16610166161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 16610166161 in words is "sixteen billion, six hundred ten million, one hundred sixty-six thousand, one hundred sixty-one".