166260361 has 2 divisors, whose sum is σ = 166260362. Its totient is φ = 166260360.

The previous prime is 166260359. The next prime is 166260377. The reversal of 166260361 is 163062661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164865600 + 1394761 = 12840^2 + 1181^2 .

It is an emirp because it is prime and its reverse (163062661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166260361 - 2¹ = 166260359 is a prime.

Together with 166260359, 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 (166260301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83130180 + 83130181.

It is an arithmetic number, because the mean of its divisors is an integer number (83130181).

Almost surely, 2^166260361 is an apocalyptic number.

It is an amenable number.

166260361 is a deficient number, since it is larger than the sum of its proper divisors (1).

166260361 is an equidigital number, since it uses as much as digits as its factorization.

166260361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 166260361 is about 12894.1987343146. The cubic root of 166260361 is about 549.8736470079.

The spelling of 166260361 in words is "one hundred sixty-six million, two hundred sixty thousand, three hundred sixty-one".