166635249 has 16 divisors (see below), whose sum is σ = 243056640. Its totient is φ = 100708560.

The previous prime is 166635239. The next prime is 166635251. The reversal of 166635249 is 942536661.

It is not a de Polignac number, because 166635249 - 2²⁵ = 133080817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166635249.

It is not an unprimeable number, because it can be changed into a prime (166635239) 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 in 15 ways as a sum of consecutive naturals, for example, 5232 + ... + 18990.

It is an arithmetic number, because the mean of its divisors is an integer number (15191040).

Almost surely, 2^166635249 is an apocalyptic number.

It is an amenable number.

166635249 is a deficient number, since it is larger than the sum of its proper divisors (76421391).

166635249 is a wasteful number, since it uses less digits than its factorization.

166635249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14140.

The product of its digits is 233280, while the sum is 42.

The square root of 166635249 is about 12908.7276290113. The cubic root of 166635249 is about 550.2866263595.

It can be divided in two parts, 16663 and 5249, that added together give a palindrome (21912).

The spelling of 166635249 in words is "one hundred sixty-six million, six hundred thirty-five thousand, two hundred forty-nine".