166925449 has 2 divisors, whose sum is σ = 166925450. Its totient is φ = 166925448.

The previous prime is 166925443. The next prime is 166925453. The reversal of 166925449 is 944529661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123365449 + 43560000 = 11107^2 + 6600^2 .

It is a cyclic number.

It is not a de Polignac number, because 166925449 - 2¹⁹ = 166401161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166925399 and 166925408.

It is not a weakly prime, because it can be changed into another prime (166925443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83462724 + 83462725.

It is an arithmetic number, because the mean of its divisors is an integer number (83462725).

Almost surely, 2^166925449 is an apocalyptic number.

It is an amenable number.

166925449 is a deficient number, since it is larger than the sum of its proper divisors (1).

166925449 is an equidigital number, since it uses as much as digits as its factorization.

166925449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 46.

The square root of 166925449 is about 12919.9631965420. The cubic root of 166925449 is about 550.6058876725.

The spelling of 166925449 in words is "one hundred sixty-six million, nine hundred twenty-five thousand, four hundred forty-nine".