166120313 has 2 divisors, whose sum is σ = 166120314. Its totient is φ = 166120312.

The previous prime is 166120307. The next prime is 166120337. The reversal of 166120313 is 313021661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145033849 + 21086464 = 12043^2 + 4592^2 .

It is an emirp because it is prime and its reverse (313021661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166120313 - 2¹² = 166116217 is a prime.

It is not a weakly prime, because it can be changed into another prime (166120393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83060156 + 83060157.

It is an arithmetic number, because the mean of its divisors is an integer number (83060157).

Almost surely, 2^166120313 is an apocalyptic number.

It is an amenable number.

166120313 is a deficient number, since it is larger than the sum of its proper divisors (1).

166120313 is an equidigital number, since it uses as much as digits as its factorization.

166120313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 166120313 is about 12888.7669309364. The cubic root of 166120313 is about 549.7192098413.

Adding to 166120313 its reverse (313021661), we get a palindrome (479141974).

The spelling of 166120313 in words is "one hundred sixty-six million, one hundred twenty thousand, three hundred thirteen".