166339949 has 2 divisors, whose sum is σ = 166339950. Its totient is φ = 166339948.

The previous prime is 166339907. The next prime is 166339963. The reversal of 166339949 is 949933661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159012100 + 7327849 = 12610^2 + 2707^2 .

It is a cyclic number.

It is not a de Polignac number, because 166339949 - 2¹⁶ = 166274413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166339897 and 166339906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166339049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83169974 + 83169975.

It is an arithmetic number, because the mean of its divisors is an integer number (83169975).

Almost surely, 2^166339949 is an apocalyptic number.

It is an amenable number.

166339949 is a deficient number, since it is larger than the sum of its proper divisors (1).

166339949 is an equidigital number, since it uses as much as digits as its factorization.

166339949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 50.

The square root of 166339949 is about 12897.2845591621. The cubic root of 166339949 is about 549.9613735959.

The spelling of 166339949 in words is "one hundred sixty-six million, three hundred thirty-nine thousand, nine hundred forty-nine".