166305773 has 2 divisors, whose sum is σ = 166305774. Its totient is φ = 166305772.

The previous prime is 166305767. The next prime is 166305779. The reversal of 166305773 is 377503661.

It is a balanced prime because it is at equal distance from previous prime (166305767) and next prime (166305779).

It can be written as a sum of positive squares in only one way, i.e., 165971689 + 334084 = 12883^2 + 578^2 .

It is a cyclic number.

It is not a de Polignac number, because 166305773 - 2²⁴ = 149528557 is a prime.

It is a super-2 number, since 2×166305773² = 55315220266255058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166305779) 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, 83152886 + 83152887.

It is an arithmetic number, because the mean of its divisors is an integer number (83152887).

Almost surely, 2^166305773 is an apocalyptic number.

It is an amenable number.

166305773 is a deficient number, since it is larger than the sum of its proper divisors (1).

166305773 is an equidigital number, since it uses as much as digits as its factorization.

166305773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 166305773 is about 12895.9595610408. The cubic root of 166305773 is about 549.9237062217.

The spelling of 166305773 in words is "one hundred sixty-six million, three hundred five thousand, seven hundred seventy-three".