168076561 has 2 divisors, whose sum is σ = 168076562. Its totient is φ = 168076560.

The previous prime is 168076549. The next prime is 168076591. The reversal of 168076561 is 165670861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149206225 + 18870336 = 12215^2 + 4344^2 .

It is a cyclic number.

It is not a de Polignac number, because 168076561 - 2¹⁷ = 167945489 is a prime.

It is not a weakly prime, because it can be changed into another prime (168076541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84038280 + 84038281.

It is an arithmetic number, because the mean of its divisors is an integer number (84038281).

Almost surely, 2^168076561 is an apocalyptic number.

It is an amenable number.

168076561 is a deficient number, since it is larger than the sum of its proper divisors (1).

168076561 is an equidigital number, since it uses as much as digits as its factorization.

168076561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 168076561 is about 12964.4344651049. The cubic root of 168076561 is about 551.8686423855.

The spelling of 168076561 in words is "one hundred sixty-eight million, seventy-six thousand, five hundred sixty-one".