166729448 has 8 divisors (see below), whose sum is σ = 312617730. Its totient is φ = 83364720.

The previous prime is 166729403. The next prime is 166729469. The reversal of 166729448 is 844927661.

It can be written as a sum of positive squares in only one way, i.e., 163277284 + 3452164 = 12778^2 + 1858^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 10420583 + ... + 10420598.

Almost surely, 2^166729448 is an apocalyptic number.

It is an amenable number.

166729448 is a deficient number, since it is larger than the sum of its proper divisors (145888282).

166729448 is a wasteful number, since it uses less digits than its factorization.

166729448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20841187 (or 20841183 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 166729448 is about 12912.3757690055. The cubic root of 166729448 is about 550.3902992730.

The spelling of 166729448 in words is "one hundred sixty-six million, seven hundred twenty-nine thousand, four hundred forty-eight".