67056161 has 2 divisors, whose sum is σ = 67056162. Its totient is φ = 67056160.

The previous prime is 67056139. The next prime is 67056179. The reversal of 67056161 is 16165076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56911936 + 10144225 = 7544^2 + 3185^2 .

It is a cyclic number.

It is not a de Polignac number, because 67056161 - 2¹⁸ = 66794017 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (67056191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33528080 + 33528081.

It is an arithmetic number, because the mean of its divisors is an integer number (33528081).

Almost surely, 2^67056161 is an apocalyptic number.

It is an amenable number.

67056161 is a deficient number, since it is larger than the sum of its proper divisors (1).

67056161 is an equidigital number, since it uses as much as digits as its factorization.

67056161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 67056161 is about 8188.7826323575. The cubic root of 67056161 is about 406.2682612383.

It can be divided in two parts, 6705 and 6161, that multiplied together give a triangular number (41309505 = T₉₀₈₉).

The spelling of 67056161 in words is "sixty-seven million, fifty-six thousand, one hundred sixty-one".