166980673 has 2 divisors, whose sum is σ = 166980674. Its totient is φ = 166980672.

The previous prime is 166980661. The next prime is 166980689. The reversal of 166980673 is 376089661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156950784 + 10029889 = 12528^2 + 3167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166980673 is a prime.

It is not a weakly prime, because it can be changed into another prime (166989673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83490336 + 83490337.

It is an arithmetic number, because the mean of its divisors is an integer number (83490337).

Almost surely, 2^166980673 is an apocalyptic number.

It is an amenable number.

166980673 is a deficient number, since it is larger than the sum of its proper divisors (1).

166980673 is an equidigital number, since it uses as much as digits as its factorization.

166980673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 166980673 is about 12922.1001776027. The cubic root of 166980673 is about 550.6666000188. Note that the first 4 decimals are identical.

The spelling of 166980673 in words is "one hundred sixty-six million, nine hundred eighty thousand, six hundred seventy-three".