166303745 has 4 divisors (see below), whose sum is σ = 199564500. Its totient is φ = 133042992.

The previous prime is 166303723. The next prime is 166303759. The reversal of 166303745 is 547303661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84419344 + 81884401 = 9188^2 + 9049^2 .

It is a cyclic number.

It is not a de Polignac number, because 166303745 - 2⁶ = 166303681 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16630370 + ... + 16630379.

It is an arithmetic number, because the mean of its divisors is an integer number (49891125).

Almost surely, 2^166303745 is an apocalyptic number.

It is an amenable number.

166303745 is a deficient number, since it is larger than the sum of its proper divisors (33260755).

166303745 is an equidigital number, since it uses as much as digits as its factorization.

166303745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33260754.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 166303745 is about 12895.8809315223. The cubic root of 166303745 is about 549.9214708818.

The spelling of 166303745 in words is "one hundred sixty-six million, three hundred three thousand, seven hundred forty-five".