166761011 has 2 divisors, whose sum is σ = 166761012. Its totient is φ = 166761010.

The previous prime is 166760989. The next prime is 166761013. The reversal of 166761011 is 110167661.

It is a strong prime.

It is an emirp because it is prime and its reverse (110167661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166761011 - 2⁶ = 166760947 is a prime.

Together with 166761013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166761013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83380505 + 83380506.

It is an arithmetic number, because the mean of its divisors is an integer number (83380506).

Almost surely, 2^166761011 is an apocalyptic number.

166761011 is a deficient number, since it is larger than the sum of its proper divisors (1).

166761011 is an equidigital number, since it uses as much as digits as its factorization.

166761011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 166761011 is about 12913.5979107296. The cubic root of 166761011 is about 550.4250279370.

The spelling of 166761011 in words is "one hundred sixty-six million, seven hundred sixty-one thousand, eleven".