166645354 has 8 divisors (see below), whose sum is σ = 252443268. Its totient is φ = 82497600.

The previous prime is 166645343. The next prime is 166645363. The reversal of 166645354 is 453546661.

It can be written as a sum of positive squares in 2 ways, for example, as 165714129 + 931225 = 12873^2 + 965^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 412287 + ... + 412690.

Almost surely, 2^166645354 is an apocalyptic number.

166645354 is a deficient number, since it is larger than the sum of its proper divisors (85797914).

166645354 is a wasteful number, since it uses less digits than its factorization.

166645354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825080.

The product of its digits is 259200, while the sum is 40.

The square root of 166645354 is about 12909.1190249374. The cubic root of 166645354 is about 550.2977495242.

The spelling of 166645354 in words is "one hundred sixty-six million, six hundred forty-five thousand, three hundred fifty-four".