166665065461 has 2 divisors, whose sum is σ = 166665065462. Its totient is φ = 166665065460.

The previous prime is 166665065417. The next prime is 166665065513. The reversal of 166665065461 is 164560566661.

166665065461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (166665065513) can be obtained adding 166665065461 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103430419236 + 63234646225 = 321606^2 + 251465^2 .

It is a cyclic number.

It is not a de Polignac number, because 166665065461 - 2¹³ = 166665057269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166665065399 and 166665065408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166665065561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83332532730 + 83332532731.

It is an arithmetic number, because the mean of its divisors is an integer number (83332532731).

Almost surely, 2^166665065461 is an apocalyptic number.

It is an amenable number.

166665065461 is a deficient number, since it is larger than the sum of its proper divisors (1).

166665065461 is an equidigital number, since it uses as much as digits as its factorization.

166665065461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 166665065461 in words is "one hundred sixty-six billion, six hundred sixty-five million, sixty-five thousand, four hundred sixty-one".